Indiana has an average annual temperature of
51.4°F
(across all 24 cities) with approximately
1034 mm of annual precipitation
and average humidity of 78%.
The warmest city is Bloomington
with average July highs of 93.2°F,
while West Lafayette
is the coldest with average January lows of -4.9°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Aug is typically the warmest month across Indiana with average highs around
91.8°F, while
Jan is the coldest with average lows near
-2°F.
May is the wettest month with approximately
115 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
52.5°F
-2°F
25.3°F
62
87%
3.7
1.70
Feb
58.6°F
3.2°F
30.9°F
59
84%
3.6
2.60
Mar
69.8°F
14.7°F
42.3°F
81
80%
3.6
3.60
Apr
77°F
25.2°F
51.1°F
102
77%
3.5
4.70
May
82.8°F
36.1°F
59.5°F
115
78%
2.9
5.50
Jun
88.2°F
46.6°F
67.5°F
108
77%
2.4
6.10
Jul
90.7°F
54.1°F
72.5°F
109
76%
2.0
6.00
Aug
91.8°F
52.5°F
72.1°F
93
72%
2.0
5.40
Sep
89.4°F
42.3°F
65.8°F
78
70%
2.3
4.40
Oct
81°F
29.8°F
55.4°F
84
73%
2.8
3.10
Nov
68.9°F
19.4°F
44.2°F
81
79%
3.2
2.00
Dec
56.7°F
5.5°F
31.1°F
74
86%
3.4
1.50
📈 Indiana Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Indiana Long-Term Climate Trends (1981–2025)
This chart shows how Indiana's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 24 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Indiana
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Indiana.
Aug is the warmest month across Indiana, with state-wide average highs of 91.8°F and average lows of 52.5°F.
How many cities in Indiana have weather data?▼
TownPillar has historical weather data for 24 cities in Indiana, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Indiana?▼
Jun is the sunniest month across Indiana with an average solar radiation of 6.10 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 24 cities in Indiana at monthly temporal resolution.