Last updated: February 24, 2025
May in Decorah, United States, showcases a dynamic weather spectrum, with daily temperatures reaching a maximum of 33°C (92°F) and dipping to a minimum of -2°C (29°F). The average temperature sits comfortably at 15°C (59°F), providing a pleasant spring ambiance. However, this month also brings considerable precipitation, totaling 155 mm (6.1 in) across 15 rainy days, contributing to the region's lush greenery. Coupled with a humidity level of 75%, the weather combines warmth with refreshing, moisture-laden air, characterizing May as an invigorating month in Decorah.
In May, Decorah transforms into a delightful spring haven, with temperatures steadily rising as the month progresses. The minimum temperature hovers around -2°C (29°F), while the average soars to a comfortable 15°C (59°F), and the maximum can reach a surprising 33°C (92°F). This pattern marks a significant shift from the lingering winter chill of earlier months, showcasing the region's transition into warmer weather. The gradual climb from the previous month’s averages not only brightens the landscape but also invites outdoor activities, making May a truly vibrant time to experience the beauty of Decorah.
In May, Decorah experiences a significant jump in precipitation, with 155 mm (6.1 in) of rainfall over 15 days. This surge reflects the transition into warmer months, where spring blooms flourish alongside increased moisture. Notably, May's precipitation exceeds that of all previous months, highlighting a trend of springtime abundance in contrast to the lighter precipitation observed in the earlier winter and early spring months. As the landscape awakens, the abundance of rain transforms Decorah into a vibrant canvas of lush greenery, underscoring the critical role of May's rainfall in nurturing the region's natural beauty.
In May, Decorah experiences a noticeable drop in humidity, averaging around 75%, a reprieve from the higher levels that characterize the earlier months of the year. This shift marks the beginning of a trend towards a drier summer, as humidity levels gradually decrease from a high of 85% in February to May's more comfortable figures. This pattern of reduced moisture continues into July, maintaining a balanced atmosphere ideal for outdoor activities. However, as autumn approaches, humidity levels start to rise again, peaking in November at 88%. Thus, May serves as a transitional month that heralds the warmer, but less humid, summer days ahead.
As we transition into May, Decorah experiences a noticeable uptick in UV intensity, with the UV Index reaching 9 and a corresponding very high exposure category. This translates to a burn time of just 15 minutes, urging residents to adopt sun safety measures. The trend reflects a significant increase from the more moderate exposure levels seen in the earlier months of the year; January through April typically featured indices ranging from 3 to 8. With summer on the horizon, individuals should remain vigilant about UV exposure, especially given that the upcoming months will sustain or even exceed May's levels. For detailed information and daily updates, check out the Decorah UV Index.
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In Decorah, United States, May heralds the arrival of abundant sunshine, with 257 hours of brilliant daylight illuminating the landscape. This delightful month showcases a significant increase from the 232 hours recorded in April, highlighting a trend where sunlight steadily builds as spring transitions into summer. Following May, the sunshine reaches even greater heights, peaking in July with an impressive 359 hours. This upward trajectory from winter's dreariness, where January only brought 129 hours, reflects the blossoming vibrancy of the season. As daylight hours continue to fluctuate, the warm embrace of early summer in Decorah is undeniably a time to relish the growing brightness, leading into the sun-drenched days of June and July.
In Decorah, the likelihood of enjoying sunny weather shows a gradual increase as spring transitions into summer. May, with a 35% chance of sunshine, offers more potential for clear skies compared to the dreariness of April, which sits at 32%. While May's sunny prospects still lag behind the balmy days of June (55%) and July (51%), the trend indicates a promising upward shift. This shift suggests that as summer approaches, residents can look forward to sunnier days, making May a month of anticipation for brighter weather ahead.
As spring gradually transitions into summer in Decorah, the growth in daylight hours is striking. In May, daylight extends to a generous 14 hours, offering residents a wonderful opportunity to embrace the outdoors. This increase is a welcome continuation from April’s 13 hours and marks a peak that will be maintained through the early summer months. The trend clearly shows longer days becoming a hallmark of this time of year, fostering a vibrant environment filled with blooming flowers and lively activities. As June unfolds, daylight will reach its zenith at 15 hours, but it gradually tapers off as summer wanes, highlighting a cycle of change that is both dynamic and anticipated.
In Decorah, United States, May ushers in a gentle breeze with an average wind speed of 3.9 m/s (9 mph), consistent with the moderate winds that characterize the spring months. Following a slight dip in wind speeds from April, where it stood at 4.1 m/s, May reflects a gradual decline leading into the summer months. This trend persists as June experiences a further drop to 3.4 m/s (7 mph), indicating a transition to calmer summer winds. Overall, the seasonal variation showcases a pattern where winds are relatively stronger in the late fall and winter months, such as November at 4.5 m/s, and tend to soften as the year progresses toward the heat of summer. These subtle shifts in wind patterns not only influence the local climate but also enhance the serene beauty of Decorah during this delightful spring month.
The weather in Decorah changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May'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.
May and January present starkly contrasting weather patterns. In May, temperatures range from a chilly -2°C (29°F) at night to a warm 33°C (92°F) during the day, with an average of 15°C (59°F). This month experiences significant precipitation, totaling 155 mm (6.1 in) over about 15 days, with humidity around 75%. In contrast, January is marked by much colder conditions, with temperatures dropping to a frigid -33°C (-28°F) at night and peaking at just 11°C (51°F) during the day, averaging -7°C (20°F). This winter month sees considerably less precipitation, amounting to only 39 mm (1.5 in) over 7 days, and a higher humidity level of 84%. For more details about the weather conditions in January, you can check Decorah weather in January.
May and February showcase stark contrasts in weather patterns. In May, temperatures range from a chilly minimum of -2°C (29°F) to a comfortable maximum of 33°C (92°F), with an average of 15°C (59°F). The month sees considerable precipitation at 155 mm (6.1 in) over 15 days, accompanied by a humidity level of 75%. In contrast, February is significantly colder, with temperatures dipping as low as -34°C (-28°F) and only reaching a maximum of 18°C (65°F), averaging -7°C (20°F). Precipitation is lighter at 52 mm (2.0 in) over 8 days, and humidity is slightly higher at 85%. Overall, May offers a warm and wet environment, while February brings frigid temperatures and less rainfall. For more details, check out Decorah weather in February.
In comparing the weather of March and May, there is a notable shift in temperatures and precipitation patterns. May sees a wider temperature range, with minimums around -2°C (29°F) and maximums reaching up to 33°C (92°F), resulting in an average temperature of 15°C (59°F). In contrast, March experiences colder conditions, with minimum temperatures dropping to -25°C (-12°F) and an average of only 2°C (35°F). Precipitation is also more significant in May, totaling 155 mm (6.1 in) over 15 days, while March has a modest 64 mm (2.5 in) spread across just 8 days. Additionally, March has a higher humidity level at 84%, compared to May's 75%. For more detailed insights into the weather in March, you can check Decorah weather in March.
In comparing the weather between April and May, we see a noticeable shift in temperatures and moisture levels. April experiences cooler average temperatures, ranging from a minimum of -11°C (13°F) to a maximum of 26°C (80°F), with an average of just 7°C (45°F). In contrast, May boasts a wider temperature range, with nighttime lows of -2°C (29°F) and highs reaching up to 33°C (92°F), culminating in an average temperature of 15°C (59°F). However, May also brings increased precipitation, totaling 155 mm (6.1 in) over 15 days, compared to April's 80 mm (3.2 in) over 10 days. Notably, while April has a slightly higher humidity level at 83%, May's humidity remains significant at 75%. For a closer look at April's weather patterns, visit Decorah weather in April.
May and June exhibit a notable shift in weather patterns. In May, temperatures range from a chilly minimum of -2°C (29°F) to a warm maximum of 33°C (92°F), with an average of 15°C (59°F). The month experiences significant rainfall, totaling 155 mm (6.1 in) over 15 days, along with a humidity level of 75%. In contrast, June brings milder temperatures, with a minimum of 8°C (48°F) and a maximum of 35°C (95°F), resulting in a warmer average of 22°C (71°F). Rainfall decreases slightly to 130 mm (5.1 in) spread over 11 days, while humidity rises to 79%. For more specific details on June weather, you can check Decorah weather in June.
In comparison to May, July typically experiences warmer temperatures, with average highs around 23°C (74°F) compared to May's average of 15°C (59°F). The minimum temperatures in July are also significantly higher, starting at 11°C (53°F) versus May's chillier minimum of -2°C (29°F). Despite July having slightly less precipitation at 106 mm (4.2 in) over 10 days compared to May's 155 mm (6.1 in) during 15 days, humidity remains consistent at 75% in both months. For more detailed weather information, you can check out Decorah weather in July.
May and August showcase distinct weather patterns that reflect the transition from spring to summer. In May, temperatures range from a chilly -2°C (29°F) at night to a warm 33°C (92°F) during the day, with an average of 15°C (59°F). This month experiences relatively high precipitation, with 155 mm (6.1 in) spread over 15 days, contributing to a humidity level of 75%. In contrast, August exhibits milder temperatures, with a minimum of 10°C (51°F), an average of 21°C (70°F), and a maximum of 34°C (94°F). Precipitation in August is lower, totaling 109 mm (4.3 in) over just 10 days, while humidity decreases slightly to 69%. For more details, check out the Decorah weather in August.
May and September exhibit notable differences in weather patterns. May experiences a wider temperature range, with minimums dropping to -2°C (29°F) and maximums soaring to 33°C (92°F), resulting in an average temperature of 15°C (59°F). In contrast, September has a milder range, with minimums of 2°C (35°F) and maximums reaching 32°C (90°F), leading to an average temperature of 18°C (65°F). While May sees higher precipitation levels at 155 mm (6.1 in) over 15 days, September receives less rainfall at 123 mm (4.8 in) across 10 days. Both months have similar humidity levels, with May at 75% and September slightly lower at 74%. For a closer look at what September brings, you can check out Decorah weather in September.
May and October present distinct weather patterns, reflecting the transition from spring to fall. In May, temperatures range from a chilly minimum of -2°C (29°F) to a warm maximum of 33°C (92°F), with an average of 15°C (59°F). The month experiences about 155 mm (6.1 in) of precipitation over 15 days, accompanied by a humidity level of 75%. In contrast, October's temperatures are cooler, with a minimum of -7°C (20°F), an average of 10°C (50°F), and a maximum of 30°C (86°F). It sees slightly less precipitation at 133 mm (5.2 in) over 11 days, along with a higher humidity level of 79%. For a more detailed look at October weather, check out Decorah weather in October.
May and November present contrasting weather patterns, marked by significant differences in temperature and precipitation. In May, temperatures typically range from a low of -2°C (29°F) to a high of 33°C (92°F), with an average of about 15°C (59°F). This month sees a total precipitation of 155 mm (6.1 in) over approximately 15 days, accompanied by a humidity level of 75%. In contrast, November experiences much cooler temperatures, with a minimum of -16°C (3°F), an average of 2°C (35°F), and a maximum of 22°C (72°F). Precipitation drops to 53 mm (2.1 in) over just 7 days, and humidity rises to 88%. For a closer look at how the weather varies in November, check out Decorah weather in November.
May and December present stark contrasts in weather conditions. In May, temperatures can vary widely, with lows around -2°C (29°F) and highs reaching up to 33°C (92°F), averaging 15°C (59°F). This month also sees significant precipitation, with 155 mm (6.1 in) falling over approximately 15 days, accompanied by a humidity level of 75%. In contrast, December experiences much colder temperatures, with a minimum of -23°C (-9°F) and a maximum of 20°C (68°F), averaging around -3°C (28°F). Precipitation drops dramatically to 38 mm (1.5 in) over just 6 days, and humidity increases slightly to 82%. For more details, you can check Decorah weather in December.
In May, Decorah experiences a significant transition, moving away from the chill of earlier months towards more temperate conditions. With average temperatures rising, the month often welcomes warmer days, complemented by increased humidity that can make the air feel tropical. However, this seasonal shift also brings the possibility of frequent rain showers, as May typically sees more precipitation than many other months. This combination of warmer temperatures and wetter weather creates a lush and vibrant landscape, making it an ideal time for exploring the natural beauty of Decorah. For a more detailed understanding of what to expect, visit Decorah Climate.