April Weather in Rapid City, United States

Last updated: February 24, 2025

April in Rapid City, United States, showcases a striking transition in weather as the region moves from the chill of winter toward the warmth of spring. With a maximum temperature peaking at 25°C (77°F), the month offers a refreshing change, complemented by an average temperature of 5°C (41°F). However, the drop to a minimum of -16°C (3°F) reminds us of the lingering winter chill. April brings about 73 mm (2.9 in) of precipitation over approximately 11 days, resulting in a humidity level of 66% that can make the air feel particularly crisp. This fluctuation in weather conditions creates a vibrant atmosphere, perfect for enjoying the emerging beauty of the season.

April Temperature in Rapid City

In April, Rapid City begins to shake off the chill of winter, with temperatures reflecting a noticeable transition. The average temperature climbs to 5°C (41°F), marking a significant jump from the frosty readings of earlier months. Mornings start with a brisk minimum of -16°C (3°F), but by midday, they can soar to a pleasant maximum of 25°C (77°F), offering a taste of the warmer days ahead. This month acts as a bridge, where the lingering cold nights give way to the first hints of spring warmth, inviting residents and visitors alike to revel in the emerging beauty of the season.

April Weather in Rapid City: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Rapid City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec272235415266726961443729
Data source: Temperature data for Rapid City generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Rapid City

In April, Rapid City experiences a notable uptick in precipitation, recording 73 mm (2.9 in) over the month, significantly higher than the previous months. This increase is reflected in the number of rainy days, which rises to 11, creating a refreshing shift in the climate as the city transitions to spring. Following March's 44 mm (1.7 in), April's rainfall paves the way for the lush growth of May, which claims the title of the wettest month with 112 mm (4.4 in). This trend highlights the city's awakening from winter dormancy, where moist April conditions not only invigorate the landscape but also set the stage for a vibrant and blossoming season ahead.

April Precipitation Trends in Rapid City

The chart displays monthly precipitation patterns in Rapid City, with values for each month alongside April's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec1427447311272965743521728
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

April Humidity in Rapid City

In April, Rapid City experiences a notable trend in humidity, with levels averaging around 66%. This marks a slight increase from the previous month's 64%, reflecting the onset of spring and the gradual warming of temperatures. Although April is one of the drier months compared to the peak humidity levels found in the summer, it serves as a precursor to the more humid conditions of May and June, where humidity can soar to 74% and 84%, respectively. Overall, the transition from the cooler months to the warmer season becomes evident, as the air begins to hold more moisture, setting the stage for the lush growth of the months ahead.

April Average Humidity in Rapid City

This chart illustrates the average monthly humidity levels in Rapid City, with April's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how April's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec73%78%64%66%74%84%85%85%76%71%73%75%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Rapid City

As April arrives in Rapid City, residents should be prepared for a significant spike in UV exposure, with the UV Index climbing to a striking 9, placing it in the very high category. This drastic increase from March's UV Index of 6 underscores the transition into spring, where the burn time is condensed to just 15 minutes. This trend of rising UV levels continues into May, which also holds a UV Index of 9, highlighting the importance of sun protection during this period. Notably, the UV Index further escalates in June and July to an extreme 11, marking a peak in sun exposure risks as outdoor activities become increasingly prevalent. For those looking to manage their sun safety during these months, detailed insights can be found at Rapid City UV Index. It’s essential for residents to stay informed and take necessary precautions as the warmer months approach.

Maximum UV Index Levels in Rapid City for April

The chart shows the monthly maximum UV Index (UVI) for Rapid City in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec356991111108532
Data source: Rapid City April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

April Sunshine in Rapid City

As April graces Rapid City with its arrival, the sunshine hours blossom to 283, marking a delightful increase from the previous months. This upward trend sets the stage for the vibrant energy of spring, as daylight begins to linger longer, coaxing the landscape into bloom. The gradual rise in sunlight from 260 hours in March to April's 283 indicates a promising shift toward the more radiant months ahead, with May showcasing an even more impressive 300 hours. This clear path of increasing sunlight not only brightens the skies but also uplifts the spirits of residents, as they look forward to the warm embrace of brighter days that continue through the summer months, peaking in June and July. The consistent growth in sunshine hours reflects not just a change in season, but an invitation to embrace the outdoors and revel in the natural beauty of Rapid City.

Monthly Sunshine Duration in Rapid City: April Highlighted

The April sunshine duration represents the total number of hours Rapid City experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec169h213h260h283h300h376h382h356h288h247h224h207h
Data source: Rapid City April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rapid City During April

In Rapid City, April marks a transition in the likelihood of sunny weather, with a 48% chance of sun. This figure sits slightly below the year's average, reflecting the lingering chill of early spring. As we compare it to march's 56%, it suggests that while there's a good chance for some sunny days, the arrival of April doesn't guarantee the warmth and brightness we often anticipate. Looking ahead, the sunny probabilities begin to climb into the summer months, peaking in August at an impressive 72%. Thus, while April may bring its share of sunshine, it serves as a gentle prelude to the sun-drenched days that lie ahead.

Percentage of Sunny Days in April in Rapid City

The chart illustrates the percentage of sunny days in Rapid City throughout the year, with April highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Rapid City experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec52%46%56%48%41%67%63%72%67%61%52%46%
Data source: Rapid City April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rapid City in April

As April unfolds in Rapid City, the days grow noticeably longer, offering a delightful 13 hours of daylight. This increase not only signals the arrival of spring but also marks a significant jump from the 11 hours in March. This upward trend continues through May, which boasts 14 hours of sunlight, and culminates in 15 hours during the peak of summer in June and July. As the year progresses, daylight gradually begins to wane, dipping back to 12 hours in September and further down to 10 hours by October. This rhythmic cycle of light and shadow not only enhances the beauty of the changing seasons but also invites residents to relish the vibrant outdoor activities that come with longer days.

Average Daylight Hours in Rapid City for April

The chart illustrates the variation in daylight duration in Rapid City throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 18m10h 28m11h 57m13h 29m14h 46m15h 25m15h 4m13h 54m12h 26m10h 56m9h 36m8h 55m
Data source: Rapid City daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Rapid City

April brings a refreshing touch of wind to Rapid City, with an average wind speed of 4.0 m/s (9 mph), matching the brisk gusts felt in January. This consistency hints at a transition as winter slowly releases its grip, paving the way for spring's arrival. Notably, the wind speed remains relatively stable throughout the early months, with March slightly surpassing February’s calmer breezes. As the city moves into May, a slight dip to 3.4 m/s (8 mph) is observed, suggesting a gradual softening of the winds. Overall, April's winds not only carry the promise of warmer days ahead but also reflect the rhythmic ebbs and flows typical of Rapid City's climate through the seasons.

Average April Wind Speed in Rapid City

The chart displays monthly wind speed patterns in Rapid City, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec4.03.23.74.0 m/s3.43.43.23.23.43.93.93.9
Data source: Rapid City April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Rapid City Compares to Other Months

The weather in Rapid City changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Rapid City and find detailed weather information for every month.

April and January present quite a contrast in weather conditions. In April, temperatures range from a minimum of -16°C (3°F) to a maximum of 25°C (77°F), with an average temperature of 5°C (41°F). The month experiences 73 mm (2.9 in) of precipitation over 11 days, accompanied by a humidity level of 66%. In stark contrast, January's temperatures are significantly colder, with a minimum of -26°C (-14°F) and a maximum of 16°C (61°F), leading to an average of -3°C (27°F). This month is much drier, receiving only 14 mm (0.5 in) of precipitation over just 4 days, and features higher humidity at 73%. For more detailed insights into January's weather patterns, you can visit Rapid City weather in January.

April generally experiences milder temperatures compared to February, with a minimum of -16°C (3°F) and an average of 5°C (41°F) compared to February's chilling lows of -29°C (-19°F) and an average of -6°C (22°F). While both months can reach maximum temperatures of 25°C (77°F) in April and 21°C (69°F) in February, April tends to have a greater range of temperatures. Precipitation is notably higher in April, with 73 mm (2.9 in) over 11 days, compared to February’s 27 mm (1.1 in) over just 7 days. Additionally, humidity is slightly lower in April at 66%, contrasted with February’s higher levels of 78%. For more details on February conditions, visit Rapid City weather in February.

In comparing the weather of April and March, April shows a notable increase in temperature, with a minimum of -16°C (3°F) and an average of 5°C (41°F), compared to March’s lower minimum of -26°C (-14°F) and an average of 2°C (36°F). The maximum temperature in April rises to 25°C (77°F), surpassing March's maximum of 22°C (71°F). Additionally, April experiences more precipitation at 73 mm (2.9 in) over 11 days, while March records 44 mm (1.7 in) over 8 days. Humidity levels are slightly higher in April at 66%, compared to 64% in March. For more detailed insights into March weather, you can visit Rapid City weather in March.

April and May show a noticeable transition in weather patterns. In April, temperatures range from a frigid minimum of -16°C (3°F) to a more moderate maximum of 25°C (77°F), with an average of 5°C (41°F). The month sees 73 mm (2.9 in) of precipitation over 11 days, accompanied by a humidity level of 66%. In contrast, May brings milder temperatures, with a minimum of -4°C (24°F) and a maximum of 30°C (86°F), leading to a comfortable average of 11°C (53°F). However, it also experiences more rain, totaling 112 mm (4.4 in) over 17 days and a slight increase in humidity to 74%. For a more detailed look at the weather in May, you can check out Rapid City weather in May.

April and June exhibit notable differences in weather, marked by variations in temperature and humidity. In April, temperatures range from a chilly minimum of -16°C (3°F) to an average of 5°C (41°F), reaching a maximum of 25°C (77°F). The month sees approximately 73 mm (2.9 in) of precipitation over 11 days, with humidity levels around 66%. In contrast, June offers a much milder climate, with temperatures starting at a minimum of 4°C (40°F) and averaging 19°C (67°F), peaking at a hot 36°C (97°F). Although precipitation is similar at 72 mm (2.8 in) over 13 days, June's higher humidity at 84% contributes to a noticeably warmer and more humid atmosphere. For a detailed overview of June weather, check out Rapid City weather in June.

April and July offer contrasting weather experiences. In April, temperatures range from a chilly minimum of -16°C (3°F) to a mild maximum of 25°C (77°F), with an average of 5°C (41°F). The month receives a moderate 73 mm (2.9 in) of precipitation over 11 days, and the humidity is a comfortable 66%. In contrast, July brings much warmer weather, with temperatures starting at a minimum of 9°C (49°F), averaging 22°C (72°F), and peaking at a sizzling 38°C (100°F). This month sees higher precipitation at 96 mm (3.8 in) spread over 16 days, along with elevated humidity levels at 85%. For more insights on the weather conditions during this summer month, check Rapid City weather in July.

April and August present strikingly different weather patterns. In April, temperatures range from a frigid minimum of -16°C (3°F) to a pleasant average of 5°C (41°F), with highs reaching 25°C (77°F). The month experiences about 73 mm (2.9 in) of precipitation over 11 days, accompanied by a humidity level of 66%. In contrast, August offers much warmer temperatures, with a minimum of 7°C (44°F) and an average of 20°C (69°F), peaking at a scorching 37°C (98°F). Precipitation in August decreases slightly to 57 mm (2.2 in) across 12 days, but humidity climbs to a notable 85%. For more information about the weather during this summer month, you can refer to Rapid City weather in August.

April and September present notable differences in weather patterns. In April, temperatures range from a chilly minimum of -16°C (3°F) to a pleasant maximum of 25°C (77°F), with an average temperature around 5°C (41°F). The month sees 73 mm (2.9 in) of precipitation over approximately 11 days, with humidity levels at 66%. In contrast, September experiences milder temperatures, with a minimum of -4°C (26°F) and a maximum that can soar to 37°C (100°F), averaging 16°C (62°F). This month has less precipitation at 43 mm (1.7 in) over about 7 days and higher humidity at 76%. For a more detailed look at September weather, visit Rapid City weather in September.

April and October present quite distinctive weather patterns, capturing the transition of seasons in their unique ways. In April, temperatures can range from a chilly -16°C (3°F) to a warmer 25°C (77°F), averaging around 5°C (41°F). The month experiences moderate precipitation with about 73 mm (2.9 in) over 11 days, accompanied by a humidity level of 66%. In contrast, October’s temperatures range from a slightly lower minimum of -18°C (-1°F) to an impressive maximum of 30°C (86°F), with an average of 7°C (45°F). This month also sees less precipitation at 52 mm (2.0 in) across 8 days, but with a higher humidity of 71%. For more detailed insights, check out Rapid City weather in October.

April and November in Rapid City present distinct weather patterns. In April, temperatures range from a low of -16°C (3°F) to a high of 25°C (77°F), with an average of around 5°C (41°F). The month tends to be wetter, with 73 mm (2.9 in) of precipitation over approximately 11 days and a humidity level of 66%. On the other hand, November features colder temperatures, with a minimum of -19°C (-2°F) and an average of 3°C (37°F), peaking at 24°C (75°F). Precipitation is significantly lower at 17 mm (0.7 in) over just 5 days, while humidity rises slightly to 73%. For more details on November weather, you can visit Rapid City weather in November.

When comparing the weather in April and December, notable differences emerge in both temperature and precipitation. In April, temperatures range from a minimum of -16°C (3°F) to a maximum of 25°C (77°F), with an average of 5°C (41°F). The month experiences 73 mm (2.9 in) of precipitation over 11 days, accompanied by a humidity level of 66%. In contrast, December presents chillier conditions, with temperatures dipping as low as -23°C (-10°F) and averaging -1°C (30°F), while the maximum reaches 21°C (70°F). Precipitation in December is lower at 28 mm (1.1 in) spread across 6 days, and humidity is slightly higher at 75%. For more detailed information, you can explore Rapid City weather in December.

Compare Rapid City's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Rapid City

As April unfurls in Rapid City, it brings a notable transition from the harsh chill of winter to more temperate conditions, though the month can still surprise with cold snaps. With a maximum temperature reaching up to 25°C, the gradual warming often contrasts sharply with chilly nights that can dip below freezing. This variability, combined with the increased precipitation days and a humidity level of 66%, marks April as a month where nature is truly awakening. While spring shines through, don’t forget that the lingering cold can still make a cameo, reminding residents that winter's farewell is always a bit unpredictable. For a deeper understanding of how weather patterns evolve, visit Rapid City Climate.