Climate and monthly weather forecastBloomington, IL
Climate and monthly weather forecast
The climate of Bloomington
Bloomington, a vibrant city within the U.S. state of Illinois, nestles in an area dominated by a humid continental climate, identified as Dfa according to the Köppen Climate Classification. This setting sparks off significant temperature variations and precipitation throughout the year.A closer look into the climatic data reveals a series of patterns. Monthly highs average from 30.7°F (-0.7°C) in January to a peak of 80.8°F (27.1°C) in July showing the sharp distinction between summer and winter temperatures. Simultaneously, night temperatures fluctuate between 18.9°F (-7.3°C) in winter and 64.6°F (18.1°C) in summer. The annual range of temperatures suggests profound differences between seasons.
Further into weather parameters, notable variations occur in the annual precipitation pattern. The city receives a rainfall range from 1.18" (30mm) in January to approximately 2.99" (76mm) in May. With 17.5 rainfall days, May also marks the peak of precipitation frequency. In contrast, dry months like December register lower rainfall figures around 1.22" (31mm) distributed over 7.1 days. December along with January and February also bring snowfall, with values extending up to 2.44" (62mm) in January.
Analyzing sunlight data reveals that June enjoys the longest daylight hours extending to 15 hours, whereas December experiences the shortest span of light, limited to around 9.3 hours. The sunshine duration aligns with this pattern, with up to 9.7 hours of clear skies in June and a shorter period of 4.1 hours in December.
The best time to visit Bloomington
The ideal period to visit Bloomington is the warmer half of the year. From May to September, the climate is warmer, and the temperatures are conducive for outdoor activities. In June, the highest amount of daylight (15 hours) and sunshine (9.7 hours) occur, creating perfect conditions for sightseeing and exploring the city.The worst time to visit Bloomington
The city can exhibit harsh and unfavorable weather conditions, particularly during the colder months from November through March. The temperatures are at their lowest, with January being the coldest, displaying a high of just 30.7°F (-0.7°C). During this phase, the city also experiences noticeable snowfall as well as reduced daylight and sunshine hours.Spring weather in Bloomington
Between March and May, Bloomington witnesses spring and a gradual increase in temperature. The average maximum extends from 48.7°F (9.3°C) in March to 72°F (22.2°C) in May while the minimum temperature ranges from 34°F (1.1°C) to 55.4°F (13°C). Additionally, the leap from 1.65" (42mm) of precipitation in March to 2.99" (76mm) in May indicates a moistening trend during the season.Summer weather in Bloomington
The summer season, from June to August, is characterized by warm temperatures. The daytime highs average around 80°F (26.7°C) while the nights stay comfortable with temperatures a bit above 60°F (15.6°C). Despite the higher temperatures, these are also the months with the most daylight hours and the maximum amount of sunshine.Autumn weather in Bloomington
Autumn in Bloomington covers September through November. It brings in a noticeable dip in temperatures but remains fairly mild compared to winter, with the daytime highs averaging between 75.7°F (24.3°C) in September and 47.7°F (8.7°C) in November. The rainfall decreases during these months, making the season slightly drier than spring and summer.Winter weather in Bloomington
Winter, prevailing from December until February, brings cold and snappy conditions to Bloomington. High temperatures can reach 30.7°F (-0.7°C) in January while the lows can plummet to a chilly 18.9°F (-7.3°C). The months are marked by reduced sunlight duration and increased cloud cover, while snowfall is prominent, enhancing the frosty feel of the season.Weather in January
In Bloomington, Illinois, the year commences with brisk temperatures and predominant cloud coverage, marking January as a typical winter month. Highs of 30.7°F (-0.7°C) and lows of 18.9°F (-7.3°C) are accompanied by snowy conditions, transforming the city into a winter wonderland. Weather in January »Weather in February
The cold persists throughout February in Bloomington, albeit with a slightly increased average temperature. Strong gusty winds continue to sweep across the city, occasionally accompanied by snowfall, adding a few fresh inches to the already accumulated winter snow. Weather in February »Weather in March
March heralds the arrival of spring in Bloomington as temperatures progressively rise and the landscapes gradually transform. Daylight hours lengthen and sunshine becomes more prevalent, providing warmer and brighter days. The transition from winter to spring is marked by melting snow and increased rainfall of roughly 1.65" (42mm), stimulating the city's natural regeneration. Weather in March »Weather in April
April experiences a significant transition in Bloomington's weather calendar, with warmer temperatures and longer daylight hours. The city welcomes the onset of consistent spring weather, which includes an increase in rainfall to an average of 2.4" (61mm), nurturing the blooming flora. Weather in April »Weather in May
May in Bloomington signifies the full bloom of spring, with mild temperatures and ample sunshine. The month is characterized by increasingly comfortable day temperatures, reinforcing the spring vibrancy. Increased rainfall nurtures the local flora, painting the city with various hues of greens. Weather in May »Weather in June
June greets Bloomington with the onset of summer, featuring longer daylight hours and significantly warmer temperatures. The city becomes a hub for outdoor activities, facilitated by the ample sunshine covering the city for almost 15 hours a day. Weather in June »Weather in July
Being the peak of summer, July brings the highest average temperature of 80.8°F (27.1°C) to Bloomington. The city is immersed in sunshine for most of the month, complemented by warm, balmy nights and a steady breeze, making it the quintessential summer month. Weather in July »Weather in August
In August, summer persists in Bloomington featuring warm temperatures similar to the previous month. The ample sunshine continues to bathe the city, turning it into a hot summer haven, with the mercury hovering close to 79.9°F (26.6°C). Weather in August »Weather in September
September embarks upon the transition from summer to fall in Bloomington, with temperatures starting to cool slightly. The city witnesses a gradual decrease in daylight hours, signaling the forthcoming change of season. Although rain showers become less frequent, they are substantial enough for the foliage to retain its lush green appearance. Weather in September »Weather in October
October brings typical autumnal charm to Bloomington, Illinois with cooler temperatures and a noticeable shortening of daylight hours. Bloomington's cityscape transforms into a canvas of warm hues as the leaves begin to change. Weather in October »Weather in November
November in Bloomington signifies the transition from the vibrant autumn to the onset of winter. The chill in the atmosphere becomes more pronounced as temperatures continue to drop, only reaching an average high of 47.7°F (8.7°C). Weather in November »Weather in December
December is characterized by consistent cold weather in Bloomington, Illinois, making it a true winter month. With an average high temperature of 36.5°F (2.5°C), the city enters the depths of winter. The concentration of cloud coverage increases with the frequency of snowfall, adding to the winter charm. Weather in December »Updated: Aug 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, with average temperatures reaching a high of 30.7°F (-0.7°C) and a low of 18.9°F (-7.3°C), is the coldest month.
January is the month with the least rainfall. Rain falls for 5.6 days and accumulates 1.18" (30mm) of precipitation.
In Bloomington, during the entire year, the rain falls for 140.6 days and collects up to 22.44" (570mm) of precipitation.
January through April, October through December are months with snowfall.
The month with the most snowfall in Bloomington is January, when snow falls for 11.5 days and typically aggregates up to 2.44" (62mm) of snow.
Throughout the year, there are 35.4 snowfall days, and 9.45" (240mm) of snow is accumulated.
January has the least sunshine of the year, with an average of 3.6h of sunshine.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
May is the month with the most rainfall. Rain falls for 17.5 days and accumulates 2.99" (76mm) of precipitation.
May through September are months without snowfall.
The month with the longest days is June, with an average of 15h and 0min of daylight.
The month with the most sunshine is June, with an average of 9.7h of sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
Bloomington's temperature records reveal July as the warmest month, marked by average highs of 80.8°F (27.1°C) and lows of 64.6°F (18.1°C).
July is the most humid month, with an average relative humidity of 85%.
With an average relative humidity of 71%, October is the least humid month in Bloomington.
December has the shortest days of the year in Bloomington, with an average of 9h and 18min of daylight.
Average temperature
Bloomington, IL
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure
Bloomington, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Bloomington, IL
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.9mph - Average wind speed in March:
10.7mph - Average wind speed in April:
11mph - Average wind speed in May:
9.3mph - Average wind speed in June:
8.1mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.8mph - Average wind speed in November:
10.6mph - Average wind speed in December:
10.5mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Bloomington, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Bloomington, IL
- Average rainfall in January:
1.18" - Average rainfall in February:
1.22" - Average rainfall in March:
1.65" - Average rainfall in April:
2.4" - Average rainfall in May:
2.99" - Average rainfall in June:
2.64"
- Average rainfall in July:
2.32" - Average rainfall in August:
2.01" - Average rainfall in September:
1.5" - Average rainfall in October:
1.89" - Average rainfall in November:
1.42" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days
Bloomington, IL
- Average rainfall days in January:
5.6 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.1 days - Average rainfall days in September:
12.2 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
8.5 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.3 days).
Average snowfall
Bloomington, IL
The month with the highest snowfall is January (2.44").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Bloomington, IL
- Average snowfall days in January:
11.5 days - Average snowfall days in February:
7.8 days - Average snowfall days in March:
4.2 days - Average snowfall days in April:
1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.3 days - Average snowfall days in November:
2.6 days - Average snowfall days in December:
8 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Bloomington, IL
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 36min - Average sunshine in February:
3h and 54min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 36min - Average sunshine in May:
8h and 36min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
9h and 24min - Average sunshine in August:
9h and 30min - Average sunshine in September:
8h and 48min - Average sunshine in October:
5h and 48min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 6min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
Bloomington, IL
- Average sunshine days in January:
14.8 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
11.1 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
9.7 days - Average sunshine days in August:
12.8 days - Average sunshine days in September:
15 days - Average sunshine days in October:
17.4 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
16.6 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.7 days).
Average UV index
Bloomington, IL
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Bloomington, IL
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility
Bloomington, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
