Indpls climate — normals and trends
Indpls (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.4 °C and it receives 1,019 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (23.9 °C on average) and the coldest is January (-2.4 °C). Rainfall peaks in May.
Indpls averages 102 frost days, 32 hot days (≥ 30 °C) and 121 rainy days per year.
Indpls has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 114 to 90 per year over the period.
The hottest day of the period reached 39.0 °C (on 25 June 1988) and the coldest -31.0 °C (on 19 January 1994).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
IndplsIndiana
- coords
- 39.77°, -86.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.4°C
Average daily high
16.3°C
Average daily low
6.8°C
Annual rainfall
1,019mm
Sunshine / day
8.7h
Mean relative humidity
70%
Average peak wind
18.0km/h
Seasonal range
26.3°C
Frost days (< 0 °C)
102 d/yr
Hot days (≥ 30 °C)
32 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
50.9 cm
Average feels-like high
14.9 °C
Average feels-like low
4.3 °C
Average peak gust
37.9 km/h
Tropical nights (≥ 20 °C)
37 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.34 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
39.0 °C
25 June 1988
Coldest day
-31.0 °C
19 January 1994
Wettest day
127 mm
1 September 2003
Windiest day
48.4 km/h
6 March 1959
Strongest gust
111.2 km/h
30 March 2022
Hottest feels-like
44.0 °C
14 July 1995
Coldest feels-like
-37.9 °C
20 January 1985
Snowiest day
26.3 cm
25 February 1979
Sunniest day
14.5 h
11 June 2024
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -0.6 °C | -2.3 °C | 44 mm | -28 mm |
| Feb | 4.1 °C | 0.0 °C | 65 mm | -3 mm |
| Mar | 14.8 °C | +4.8 °C | 137 mm | +35 mm |
| Apr | 17.9 °C | +1.2 °C | 171 mm | +63 mm |
| May | 21.5 °C | -0.7 °C | 87 mm | -23 mm |
| Jun | 28.7 °C | +1.6 °C | 105 mm | +8 mm |
| Jul | 30.5 °C | +1.7 °C | 141 mm | +53 mm |
| Aug | 27.6 °C | -0.5 °C | 31 mm | -42 mm |
| Sep | 27.1 °C | +2.4 °C | 53 mm | -15 mm |
| Oct | 20.2 °C | +2.0 °C | 51 mm | -21 mm |
| Nov | 11.0 °C | +0.7 °C | 53 mm | -32 mm |
| Dec | 4.2 °C | +0.1 °C | 51 mm | -25 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Indpls?
Indpls has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.4 °C and it receives 1,019 mm of precipitation per year.
What is the hottest day ever recorded in Indpls?
The hottest day measured in Indpls between 1940 and 2025 was 25 June 1988, reaching 39.0 °C.
What is the coldest day in Indpls?
The coldest day measured in Indpls between 1940 and 2025 was 19 January 1994, at -31.0 °C.
Does it snow in Indpls?
Yes. Indpls gets on average 50.9 cm of snow per year and has around 102 frost days.
Has the climate of Indpls warmed?
Yes: Indpls warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Indpls?
The wettest day measured in Indpls between 1940 and 2025 was 1 September 2003, with 127 mm of rain in 24 hours.
What was the windiest day in Indpls?
The windiest day measured in Indpls between 1940 and 2025 was 6 March 1959, with winds reaching 48.4 km/h.
What is the warmest month in Indpls?
The warmest month in Indpls is July (23.9 °C on average); the coldest is January (-2.4 °C).
How much does it rain in Indpls?
Indpls receives on average 1,019 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Indpls?
Indpls gets on average 8.7 hours of sunshine per day, roughly 3,175 hours per year over 1940-2025.
What is the biggest single-day snowfall in Indpls?
The heaviest 24-hour snowfall measured in Indpls between 1940 and 2025 was 25 February 1979, with 26.3 cm.
Are there tropical nights in Indpls?
Yes: Indpls has on average 37 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Indpls?
In Indpls, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 14 July 1995, and the lowest was -37.9 °C on 20 January 1985.
Compare Indpls with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Indpls