Climate and monthly weather forecastBloomington, IN
Climate and monthly weather forecast
The climate of Bloomington
Bloomington, Indiana, USA, experiences a Humid Subtropical climate, with no dry season, under the Köppen Climate Classification of Cfa. This Midwestern city's geographical position contributes to its variety of weather conditions throughout the year. Annual weather distinctly reflects changes in monthly parameters, showcasing considerable difference in temperatures, rainfall, humidity, daylight, UV index, and other factors.Throughout the year, Bloomington experiences varying degrees of weather changes. High temperatures range from 35.6°F (2°C) in January to a peak of 84°F (28.9°C) in July. The lower spectrum of temperatures, on the other hand, shifts between 22.5°F (-5.3°C) and 65.8°F (18.8°C) over the year. These temperatures reveal stark contrasts between Bloomington's seasons.
Humidity in the city demonstrates a consistency, fluctuating from 75% in October to 82% during both January and May. The rainfall measurement demonstrates a similar trend, with the highest rainfall of 3.11" (79mm) recorded in April, and the lowest, 1.65" (42mm), during both September and October. Simultaneously, the city experiences varying hours of daylight from 9.5 hours in December to as high as 14.9 hours in June.
October imposes the highest percentage of sunshine days (18.9), while May provides the lowest (9.2). The UV index reaches a maximum of 6 from May to August, signaling stronger sun radiation during these months. Snowfall is confined to the colder timeframe, from 2.28" (58mm) in January dropping to no recorded snowfall from May to October.
The best time to visit Bloomington
Analysis of weather patterns suggests that the most pleasant time to visit Bloomington is from May to September. The city enters the season of warmer temperatures, ranging from 72.9°F (22.7°C) to 84°F (28.9°C), during this period, with the lowest average temperature being 55.8°F (13.2°C). It also enjoys the longest daylight duration, averaging between 14.3 hours and 14.9 hours daily, giving visitors ample time to explore and enjoy the city. Rainfall is moderate, ensuring a comfortable atmosphere without major disruptions to travel plans.The worst time to visit Bloomington
The least desirable time to visit Bloomington would be during the cold months of January and February. The city experiences the lowest temperatures during this period, with highs fluctuating between 35.6°F (2°C) and 40.5°F (4.7°C) and lows dropping to between 22.5°F (-5.3°C) and 26.2°F (-3.2°C). It also records higher snowfall, with an average of 2.28" (58mm) in January and 1.5" (38mm) in February.Spring weather in Bloomington
As Bloomington transitions from winter to spring, the city experiences a very significant weather shift. From March to May, the high temperature gradually increases from 51.6°F (10.9°C) to 72.9°F (22.7°C), and the low temperature rises from 36.1°F (2.3°C) to 55.8°F (13.2°C). March experiences the most rain, however, with precipitation reaching 2.56" (65mm), but rainfall decreases to 2.99" (76mm) by May. The city also experiences extended daylight hours during spring, from 12 hours in March to 14.3 hours in May.Summer weather in Bloomington
Bloomington experiences its warmest weather from June through August, during which temperatures escalate to an average high between 81.3°F (27.4°C) and 84°F (28.9°C). The lowest temperatures during these months remain comfortably warm, fluctuating from 63.5°F (17.5°C) to 65.8°F (18.8°C). Despite the heat, rainfall is relatively low, with the least amount in August at 2.13" (54mm). Additionally, the city gets to enjoy extended periods of daylight, reaching its peak in June with 14.9 hours daily.Autumn weather in Bloomington
Bloomington undergoes a gradual temperature drop in Autumn, from September to November. High temperatures decrease from 77.2°F (25.1°C) to 51.3°F (10.7°C), whereas low temperatures fall from 58.1°F (14.5°C) to 36.1°F (2.3°C). Rainfall shows a decreasing trend from 1.65" (42mm) in September to 1.97" (50mm) in November. In contrast, the average daily sunlight hours drop, signaling shorter days.Winter weather in Bloomington
Witnessing a characteristic cold season from December to February, Bloomington's high temperatures range from 35.6°F (2°C) to 40.6°F (4.8°C), while the low temperatures fluctuate between 22.5°F (-5.3°C) and 29.3°F (-1.5°C). The city sees most of its snowfall during these months, with an average of 2.28" (58mm) in January. As winter peaks, daylight hours decrease, with the shortest daylight duration of 9.5 hours in December.Weather in January
Bloomington, Indiana, starts the year with temperatures at their lowest and extended periods of overcast skies. In comparison to the next month, January tends to be colder and experiences higher snowfall, with an average of 2.28" (58mm). Weather in January »Weather in February
As Bloomington enters February, a subtle shift in weather patterns is discernible. A modest spike in temperature is noticed from January's averages of 35.6°F (2°C), coupled with a reduction in snowfall. Prevailing conditions permit slight relief to the residents, who start shedding layers in anticipation of warmth. Weather in February »Weather in March
March signals the arrival of Spring in Bloomington, inducing noticeable transformations in the city’s weather. The temperature begins to scale upward from February’s average low of 26.2°F (-3.2°C) along with a significant drop in snowfall. Weather in March »Weather in April
Bloomington in April becomes more jovial, showing visible signs of bidding adieu to the harsh winters. A general sense of warmth is noticeable, with an average high temperature that scales up to 63.1°F (17.3°C) from March’s 51.6°F (10.9°C). Weather in April »Weather in May
May in Bloomington marks the official transition to the summer season. There is a significant improvement in weather conditions, especially when contrasted with April’s 2.56" (65mm) of rainfall. A distinct flurry of activities revitalizes the city after the long winter and spring seasons. Weather in May »Weather in June
Weather in Bloomington during June presents a quintessential summer scenario, featuring high temperatures and ample sunshine. Bloomington sees its highest average temperatures in June, peaking at 81.3°F (27.4°C) from May’s 72.9°F (22.7°C). Weather in June »Weather in July
July in Bloomington proceeds to push the envelope further when it comes to summer warmth. The temperatures exceed June's peak and almost touch the sweltering level, the highest being 84°F (28.9°C). Simultaneously, the city's life continues unabated, shifting gracefully between long sunny days and cooler evenings. Weather in July »Weather in August
With August, comes a slight relaxation in Bloomington's weather intensity. A minor drop in the average maximum temperature from 84°F (28.9°C) in July brings a subtle coolness in the city's air. As the month progresses, the weather gradually paves the way for the approaching fall. Weather in August »Weather in September
September in Bloomington brings about untold transformations in its climate, signaling the commencement of Fall. A fall in temperature from August’s high of 82.9°F (28.3°C) introduces a fresh crispness to the air. Nature starts painting the city's foliage in hues of red, orange, and yellow. Weather in September »Weather in October
Bloomington in October takes on a quaint charm as the Fall season sets in definitively. With temperatures receding from September’s high of 77.2°F (25.1°C), sweaters and light jackets make their first appearance for the season. Weather in October »Weather in November
November amplifies the chill in Bloomington’s atmosphere, further plummeting from October’s average low of 46.9°F (8.3°C). Marks of vibrant autumn make way for the approaching winters, with the landscape turning a stark contrast of bare trees and fallen leaves. Weather in November »Weather in December
December in Bloomington is a display of enchanting winters, characterized by dipping temperatures and increased snowfall. The average snowfall scales to 1.85" (47mm), biggest since January’s snowfall of 2.28" (58mm). It rings in the long-awaited festive season with the city beautifully festooned in Christmas decorations. Weather in December »Updated: Jun 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, with its average high-temperature of 35.6°F (2°C) and an average low-temperature of 22.5°F (-5.3°C), holds the record as the coldest month.
In Bloomington, during the entire year, the rain falls for 150.5 days and collects up to 27.56" (700mm) of precipitation.
Months with snowfall are January through April, November and December.
Throughout the year, there are 26.7 snowfall days, and 9.13" (232mm) of snow is accumulated.
January, February, October and December, with an average maximum UV index of 2, are months with the lowest UV index.
The month with the most snowfall is March, when snow falls for 4.3 days and typically aggregates up to 2.6" (66mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April is the month with the most rainfall. Rain falls for 15.3 days and accumulates 3.11" (79mm) of precipitation.
The months with the highest humidity are May and December, with an average relative humidity of 82%.
In Bloomington, snow does not fall in May through October.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
June has the longest days of the year, with an average of 14h and 54min of daylight.
June has the most sunshine of the year, with an average of 10.2h of sunshine.
July, with average temperatures reaching a high of 84°F (28.9°C) and a low of 65.8°F (18.8°C), is the warmest month.
September and October are months with the least rain when the rain falls for 12.4 days and typically aggregates up to 1.65" (42mm) of rain.
With an average relative humidity of 75%, October is the least humid month.
With an average of 9h and 30min of daylight, December has the shortest days of the year.
With an average of 4.2h of sunshine, December has the least sunshine of the year.
Average temperature
Bloomington, IN
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (35.6°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure
Bloomington, IN
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Bloomington, IN
- Average wind speed in January:
8.5mph - Average wind speed in February:
8.6mph - Average wind speed in March:
8.3mph - Average wind speed in April:
8.3mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.2mph - Average wind speed in August:
5.2mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7.2mph - Average wind speed in November:
7.6mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).
Average humidity
Bloomington, IN
The months with the highest relative humidity are May and December (82%).
The month with the lowest relative humidity is October (75%).
Average rainfall
Bloomington, IN
- Average rainfall in January:
1.93" - Average rainfall in February:
1.85" - Average rainfall in March:
2.56" - Average rainfall in April:
3.11" - Average rainfall in May:
2.99" - Average rainfall in June:
2.83"
- Average rainfall in July:
2.72" - Average rainfall in August:
2.13" - Average rainfall in September:
1.65" - Average rainfall in October:
1.65" - Average rainfall in November:
1.97" - Average rainfall in December:
2.17"
The wettest month (with the highest rainfall) is April (3.11").
The driest months (with the least rainfall) are September and October (1.65").
Average rainfall days
Bloomington, IN
- Average rainfall days in January:
7.9 days - Average rainfall days in February:
8.1 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
15.3 days - Average rainfall days in May:
19.2 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
16.6 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
12.4 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
9 days - Average rainfall days in December:
9.5 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is January (7.9 days).
Average snowfall
Bloomington, IN
The month with the highest snowfall is March (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Bloomington, IN
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
4.3 days - Average snowfall days in April:
0.9 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:
0.2 days - Average snowfall days in November:
1.6 days - Average snowfall days in December:
5.8 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Bloomington, IN
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
4h and 18min - Average sunshine in February:
5h and 24min - Average sunshine in March:
6h and 18min - Average sunshine in April:
7h and 12min - Average sunshine in May:
8h and 36min - Average sunshine in June:
10h and 12min
- Average sunshine in July:
10h and 6min - Average sunshine in August:
9h and 24min - Average sunshine in September:
8h and 24min - Average sunshine in October:
7h and 0min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 12min).
Average sunshine days
Bloomington, IN
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
14.7 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
12.8 days - Average sunshine days in May:
9.2 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
14 days - Average sunshine days in September:
15.4 days - Average sunshine days in October:
18.9 days - Average sunshine days in November:
19.3 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (9.2 days).
Average UV index
Bloomington, IN
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, October and December (UV index 2).
Average cloud cover
Bloomington, IN
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility
Bloomington, IN
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).
