Indianola climate — normals and trends
Indianola (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.2 °C and it receives 913 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 (24.3 °C on average) and the coldest is January (-6.0 °C). Rainfall peaks in May.
Indianola averages 122 frost days, 38 hot days (≥ 30 °C) and 105 rainy days per year.
Indianola 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 131 to 113 per year over the period.
The hottest day of the period reached 39.9 °C (on 25 July 2012) and the coldest -32.4 °C (on 3 February 1996).
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
IndianolaIowa
- coords
- 41.36°, -93.56°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.2°C
Average daily high
15.3°C
Average daily low
5.3°C
Annual rainfall
913mm
Sunshine / day
9.1h
Mean relative humidity
70%
Average peak wind
21.8km/h
Seasonal range
30.3°C
Frost days (< 0 °C)
122 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
105 d/yr
Annual snowfall
65.8 cm
Average feels-like high
13.1 °C
Average feels-like low
2.2 °C
Average peak gust
40.0 km/h
Tropical nights (≥ 20 °C)
35 d/yr
Solar radiation
15.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.27 · 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
39.9 °C
25 July 2012
Coldest day
-32.4 °C
3 February 1996
Wettest day
101 mm
21 July 1961
Windiest day
71.3 km/h
9 April 1973
Strongest gust
116.6 km/h
5 May 1950
Hottest feels-like
45.7 °C
6 July 1948
Coldest feels-like
-38.7 °C
3 February 1996
Snowiest day
30.7 cm
9 April 1973
Sunniest day
14.8 h
19 June 1940
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 | -0.2 °C | +1.3 °C | 19 mm | -15 mm |
| Feb | 0.4 °C | -0.9 °C | 14 mm | -23 mm |
| Mar | 15.2 °C | +7.0 °C | 80 mm | +7 mm |
| Apr | 17.2 °C | +1.3 °C | 106 mm | +4 mm |
| May | 22.8 °C | +1.0 °C | 95 mm | -27 mm |
| Jun | 29.2 °C | +2.0 °C | 161 mm | +43 mm |
| Jul | 29.7 °C | +0.3 °C | 188 mm | +94 mm |
| Aug | 27.6 °C | -0.8 °C | 52 mm | -36 mm |
| Sep | 27.3 °C | +3.0 °C | 44 mm | -43 mm |
| Oct | 21.0 °C | +3.1 °C | 90 mm | +21 mm |
| Nov | 10.8 °C | +1.8 °C | 41 mm | -11 mm |
| Dec | 3.1 °C | +1.5 °C | 29 mm | -10 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 Indianola?
Indianola has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.2 °C and it receives 913 mm of precipitation per year.
What is the hottest day ever recorded in Indianola?
The hottest day measured in Indianola between 1940 and 2025 was 25 July 2012, reaching 39.9 °C.
What is the coldest day in Indianola?
The coldest day measured in Indianola between 1940 and 2025 was 3 February 1996, at -32.4 °C.
Does it snow in Indianola?
Yes. Indianola gets on average 65.8 cm of snow per year and has around 122 frost days.
Has the climate of Indianola warmed?
Yes: Indianola warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Indianola?
The wettest day measured in Indianola between 1940 and 2025 was 21 July 1961, with 101 mm of rain in 24 hours.
What was the windiest day in Indianola?
The windiest day measured in Indianola between 1940 and 2025 was 9 April 1973, with winds reaching 71.3 km/h.
What is the warmest month in Indianola?
The warmest month in Indianola is July (24.3 °C on average); the coldest is January (-6.0 °C).
How much does it rain in Indianola?
Indianola receives on average 913 mm of precipitation per year, spread over about 105 rainy days.
Is it sunny in Indianola?
Indianola gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Indianola?
The heaviest 24-hour snowfall measured in Indianola between 1940 and 2025 was 9 April 1973, with 30.7 cm.
Are there tropical nights in Indianola?
Yes: Indianola has on average 35 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Indianola?
In Indianola, between 1940 and 2025, the highest apparent temperature reached 45.7 °C on 6 July 1948, and the lowest was -38.7 °C on 3 February 1996.
Compare Indianola with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Indianola