August Weather in Decorah, United States

Last updated: February 24, 2025

August in Decorah, United States, showcases a lively blend of summer warmth and occasional rainfall. Temperatures range from a peak of 34°C (94°F) to a cooler 10°C (51°F), with an average of 21°C (70°F) providing a pleasant backdrop for outdoor activities. Throughout the month, Decorah experiences 109 mm (4.3 in) of precipitation over 10 days, contributing to a humidity level of 69% that enhances the lush scenery of this charming area. Whether basking in the sun or enjoying the refreshing rain, August in Decorah offers a dynamic meteorological experience.

August Temperature in Decorah

In August, Decorah basks in warm and pleasant weather, with temperatures reflecting the peak of summer. The average temperature hovers around 21°C (70°F), providing a comfortable backdrop for outdoor activities. With a minimum of 10°C (51°F) and a maximum reaching up to 34°C (94°F), the month showcases a delightful range that encourages exploration of the region’s natural beauty. This warmth follows the trend of rising temperatures from the mid-year months, as July marked the height of summer activity with similar highs but slightly higher averages. As summer gently transitions into fall, August stands out as a vibrant month, perfect for enjoying the outdoors before the cooler temperatures of September set in.

August Weather in Decorah: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Decorah, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec192035455971747064493527
Data source: Temperature data for Decorah generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Decorah

In August, Decorah experiences a noteworthy precipitation total of 109 mm (4.3 in), marking a slight increase compared to July's 106 mm (4.2 in). This uptick in rainfall occurs over 10 days, consistent with the previous summer month. The late summer weather patterns suggest a transition towards the wetter conditions often seen in September, where precipitation rises again to 123 mm (4.8 in). Notably, May remains the peak month for rainfall, with a significant total of 155 mm (6.1 in) across 15 days, highlighting a trend of late spring and summer months being particularly wet. Overall, August serves as a bridge, maintaining high moisture levels while hinting at the arrival of autumn's even rainier days.

August Precipitation Trends in Decorah

The chart displays monthly precipitation patterns in Decorah, with values for each month alongside August's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec395264801551301061101231335338
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Decorah

August in Decorah ushers in a noticeable shift in humidity, dipping to 69%, the lowest point of the year. This decline marks a departure from the consistently high humidity levels of the winter months, where January and February hover around 84-85%. As spring melts into summer, humidity levels remain relatively stable until July, when they drop to 75%. This gradual descent leads into August's brief reprieve before humidity begins to rise again in September, reaching 74%. Overall, the trend reveals a seasonal ebb and flow, emphasizing the refreshing changes brought on by late summer.

August Average Humidity in Decorah

This chart illustrates the average monthly humidity levels in Decorah, with August's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how August's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%85%84%83%75%79%75%69%74%79%88%82%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Decorah

In August, Decorah experiences a UV Index of 9, categorized as very high, which means residents and visitors alike should take precautions to protect their skin from sunburn, with a burn time of just 15 minutes. This summer peak follows a trend observed since April, where UV levels have remained significantly elevated, making this month a time for heightened awareness around sun exposure. Compared to the earlier months of the year, where the UV Index was more moderate, August stands out as part of a consistent pattern of intense sunlight, urging outdoor enthusiasts to plan their activities wisely. As the season transitions into September, one can expect a slight drop in UV levels, but until then, it's vital to stay vigilant under the sun. For more details, check out the Decorah UV Index to stay informed and protected.

Maximum UV Index Levels in Decorah for August

The chart shows the monthly maximum UV Index (UVI) for Decorah in August, 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.
JanFebMarAprMayJunJulAugSepOctNovDec34589101098532
Data source: Decorah August 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.

August Sunshine in Decorah

In August, Decorah basks in radiant sunshine, tallying an impressive 324 hours of sunlight, just a shade below July's peak of 359 hours. This summer month continues the trend of increased daylight that began in early spring, with March, April, and May each contributing steadily more sunlight as the days grew longer. The sunshine hours peak during the vibrant summer months, with June and July being the standout winners. As August rolls in, although the days gradually shorten, the abundant sunlight still creates a warm, inviting atmosphere. The decline in daylight as September approaches hints at the transition into fall, but for now, August stands as a radiant conclusion to the sun-kissed season, encouraging outdoor activities and cherished moments under the open sky.

Monthly Sunshine Duration in Decorah: August Highlighted

The August sunshine duration represents the total number of hours Decorah experiences direct sunlight during the month of August, excluding cloudy or obstructed periods. This chart compares the sunshine duration of August with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec129h194h231h232h257h332h359h324h261h200h191h180h
Data source: Decorah August Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Decorah During August

As summer reaches its peak in August, Decorah, United States, experiences a notable rise in the likelihood of sunny weather, with chances climbing to 57%. This upward trend from the preceding months highlights the progression of the season; both June and July showcase over 50% likelihood of sunshine as well. Interestingly, as we transition from August to September, the probabilities continue to increase, peaking at 63% in September. This suggests that while August delivers considerable warmth and sunlight, the promise of sunny days tends to linger into early autumn, ensuring that residents and visitors alike can enjoy the best of what Decorah has to offer during this vibrant time of year.

Percentage of Sunny Days in August in Decorah

The chart illustrates the percentage of sunny days in Decorah throughout the year, with August 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 Decorah experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec25%33%42%32%35%55%51%57%63%42%41%36%
Data source: Decorah August chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Decorah in August

In August, Decorah enjoys a robust 13 hours of daylight, marking a subtle transition from the peak brightness of summer. As the month unfolds, daylight begins its gradual decline, following the longest days of June and July, each boasting 15 and 14 hours, respectively. This shift signals the approach of fall, as daylight hours decrease steadily, dipping to 12 hours in September. The ebb and flow of daylight throughout the year highlights a rhythm of renewal and change, creating a beautiful tapestry of seasons that beautifully defines life in Decorah.

Average Daylight Hours in Decorah for August

The chart illustrates the variation in daylight duration in Decorah throughout the year, with August highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 23m10h 31m11h 57m13h 26m14h 41m15h 18m14h 58m13h 51m12h 26m10h 58m9h 41m9h 1m
Data source: Decorah daylight hours, calculated by summing the hours between sunrise and sunset for each day.

August Winds in Decorah

In Decorah, the wind patterns throughout the year reveal a gentle ebb and flow, particularly noticeable in August. During this month, the average wind speed settles at 3.0 m/s (7 mph), slightly lower than the summer peak of 3.4 m/s (7 mph) in June and a noticeable drop from the lively 4.2 m/s (9 mph) experienced in March. As we transition into fall, September picks up a bit with a return to 3.5 m/s (8 mph), suggesting that the breezy nature of Decorah tends to revive as the seasons change, making late summer and early autumn ideal for enjoying the serene whispers of the wind. This trend highlights a seasonal rhythm where August serves as a calm interlude before the winds pick up in intensity with the approach of autumn.

Average August Wind Speed in Decorah

The chart displays monthly wind speed patterns in Decorah, with values for each month shown alongside August's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how August's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.43.64.24.13.93.42.93.0 m/s3.53.74.54.2
Data source: Decorah August wind data, generated using information from the Copernicus Climate Change Service.

How August Weather in Decorah Compares to Other Months

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

The weather in August presents a stark contrast to that of January. In August, temperatures can range from a comfortable minimum of 10°C (51°F) to a scorching maximum of 34°C (94°F), with an average of 21°C (70°F). This month sees a fair amount of precipitation, totaling 109 mm (4.3 in) over about 10 days, all while maintaining a humidity level of 69%. Conversely, January brings frigid conditions, with temperatures plummeting as low as -33°C (-28°F) and averaging around -7°C (20°F). The maximum temperature only reaches 11°C (51°F) and precipitation is considerably lower at 39 mm (1.5 in) over approximately 7 days, accompanied by a higher humidity of 84%. For more detailed insights into January's climate, you can check Decorah weather in January.

August and February exhibit drastically different weather patterns. In August, temperatures range from a mild 10°C (51°F) at night to a warm 34°C (94°F) during the day, accompanied by significant humidity at 69%. Precipitation is relatively high, averaging 109 mm (4.3 in) over about 10 days. In contrast, February presents frigid conditions, with temperatures plummeting as low as -34°C (-28°F) and averaging -7°C (20°F). Although February sees less precipitation at 52 mm (2.0 in) over 8 days, the humidity is notably higher at 85%. For a closer look at what to expect, you can check Decorah weather in February.

In comparing the weather of August and March, it’s clear that these months present stark contrasts. August features a warm climate with average temperatures around 21°C (70°F) and highs reaching up to 34°C (94°F). While it experiences considerable rainfall, averaging 109 mm (4.3 in) over about 10 days, the humidity is relatively moderate at 69%. In contrast, March is characterized by much colder conditions, with average temperatures hovering around 2°C (35°F) and a chilly minimum of -25°C (-12°F). Although it sees slightly less precipitation at 64 mm (2.5 in) across approximately 8 days, the humidity is higher at 84%. This difference in climate makes August feel significantly more temperate and inviting compared to the harsh chill of March. For more specific insights on March weather, you can explore Decorah weather in March.

When comparing the weather in August and April, significant differences emerge. August boasts warmer temperatures, with a minimum of 10°C (51°F) and an average high reaching up to 34°C (94°F), creating a much more summer-like atmosphere. In contrast, April temperatures can plunge to a minimum of -11°C (13°F) and only rise to an average maximum of 26°C (80°F), indicating a transition from winter to spring.

While both months experience precipitation over similar numbers of days (10), August sees greater overall rainfall at 109 mm (4.3 in) compared to April's 80 mm (3.2 in). Interestingly, April has a higher humidity level at 83%, while August's humidity stands at 69%. For more detailed insights into April weather specifics, check out Decorah weather in April.

August and May present quite contrasting weather conditions. In August, the temperatures range from a minimum of 10°C (51°F) to a maximum of 34°C (94°F), with an average of 21°C (70°F). The month experiences around 109 mm (4.3 in) of precipitation over approximately 10 days, coupled with a humidity level of 69%. In comparison, May has a broader temperature variation, with lows dropping to -2°C (29°F) and highs reaching 33°C (92°F). The average temperature is significantly cooler at 15°C (59°F), alongside higher precipitation at 155 mm (6.1 in) over about 15 days, with humidity slightly elevated at 75%. For more detailed information, check out Decorah weather in May.

When comparing the weather of August and June, both months offer warm temperatures, but August tends to be slightly milder in terms of average temperature. August has a minimum temperature of 10°C (51°F) and a maximum of 34°C (94°F), with an average of 21°C (70°F). In contrast, June's temperatures range from a minimum of 8°C (48°F) to a maximum of 35°C (95°F), with a very similar average of 22°C (71°F). Precipitation is slightly lower in August, totaling 109 mm (4.3 in) over 10 days compared to June's 130 mm (5.1 in) over 11 days. Humidity levels also differ, with August at 69% and June a bit higher at 79%. For more detailed information, you can check Decorah weather in June.

In comparing the weather of July and August, both months experience similar maximum temperatures, reaching up to 34°C (94°F) in August and 34°C (93°F) in July. However, July tends to be slightly warmer overall, with an average temperature of 23°C (74°F) compared to August's 21°C (70°F). Precipitation levels are comparable, with July receiving 106 mm (4.2 in) and August slightly more at 109 mm (4.3 in), both spread over 10 days. Additionally, humidity is a bit higher in July at 75%, compared to 69% in August. For a more detailed look at July's weather, you can check Decorah weather in July.

August typically features warmer temperatures, with an average of 21°C (70°F) and maximum highs reaching up to 34°C (94°F). In contrast, September brings a noticeable drop in temperatures, averaging 18°C (65°F) and peaking at 32°C (90°F). While both months experience a similar number of rainy days—around 10—September sees slightly increased precipitation at 123 mm (4.8 in) compared to August's 109 mm (4.3 in). Additionally, September exhibits higher humidity levels at 74%, up from 69% in August. For more detailed insights, check out Decorah weather in September.

August and October exhibit markedly different weather patterns. In August, temperatures range from a minimum of 10°C (51°F) to a maximum of 34°C (94°F), with an average of 21°C (70°F), making it a warmer month. In contrast, October sees a lower average temperature of 10°C (50°F), with a minimum of -7°C (20°F) and a maximum reaching 30°C (86°F). Additionally, both months experience significant precipitation, with October having slightly more at 133 mm (5.2 in) over 11 days compared to August's 109 mm (4.3 in) over 10 days. Humidity also increases in October to 79%, compared to 69% in August, contributing to a more damp feel during the fall. For a closer look at the weather specifics, check out Decorah weather in October.

August and November present stark contrasts in weather conditions. In August, temperatures soar from a minimum of 10°C (51°F) to a maximum of 34°C (94°F), with an average of 21°C (70°F). The month sees considerable rainfall, with 109 mm (4.3 in) spread across 10 days, and a moderate humidity of 69%. In sharp contrast, November experiences a significant drop in temperatures, ranging from a chilly -16°C (3°F) to a maximum of 22°C (72°F), with an average temperature of just 2°C (35°F). Precipitation is also lower at 53 mm (2.1 in) over 7 days, but humidity rises to a damp 88%. For more details, visit Decorah weather in November.

August and December present strikingly contrasting weather patterns. In August, temperatures typically range from a mild 10°C (51°F) at night to a scorching 34°C (94°F) during the day, accompanied by relatively high humidity at 69%. This month also experiences significant rainfall, totaling 109 mm (4.3 inches) over approximately 10 days. In stark contrast, December's temperatures plummet, with a minimum of -23°C (-9°F) and a much cooler average of -3°C (28°F), while the maximum only reaches 20°C (68°F). Precipitation in December is much lighter, totaling just 38 mm (1.5 inches) over about 6 days, and humidity levels rise to 82%. For more detailed information, check out Decorah weather in December.

Compare Decorah's Climate with Cities Worldwide

Conclusion: What to Expect From August Weather in Decorah

August in Decorah showcases a unique blend of warmth and humidity, with temperatures reaching up to 34°C (94°F) and an average of 21°C (70°F), indicating a significant departure from the cooler months. The humidity hovers around 69%, creating a muggy atmosphere that gently wraps around the vibrant summer days. With 109 mm of precipitation spread across 10 days, August emerges as one of the wetter months, contributing to the lush greenery that Decorah is known for. As the summer draws to a close, the weather invites both adventure and introspection, making it a pivotal time to enjoy the outdoors before transitioning into the crisp fall season. For more insights into seasonal variations, check out Decorah Climate.