South Dakota has an average annual temperature of
50.4°F
(across all 2 cities) with approximately
556 mm of annual precipitation
and average humidity of 65%.
The warmest city is Rapid City
with average July highs of 103.3°F,
while Sioux Falls
is the coldest with average January lows of -12.3°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Jul is typically the warmest month across South Dakota with average highs around
100.6°F, while
Jan is the coldest with average lows near
-6.3°F.
Jun is the wettest month with approximately
90 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
51.1°F
-6.3°F
22.3°F
12
76%
3.3
2.00
Feb
58.6°F
-3.5°F
27.7°F
14
71%
3.4
3.00
Mar
71.2°F
8.1°F
39.7°F
34
65%
3.6
3.90
Apr
81.7°F
20.1°F
50.9°F
63
61%
3.7
5.00
May
88.9°F
32°F
60.4°F
87
61%
3.3
5.80
Jun
96.1°F
45.1°F
70.7°F
90
60%
2.9
6.60
Jul
100.6°F
52.5°F
76.6°F
68
57%
2.6
6.70
Aug
99°F
50.2°F
74.7°F
62
58%
2.5
5.70
Sep
93.7°F
36.9°F
65.3°F
51
57%
2.9
4.50
Oct
81.9°F
22.8°F
52.3°F
47
63%
3.1
3.10
Nov
66°F
11.1°F
38.5°F
21
69%
3.1
2.00
Dec
50.9°F
-2.4°F
24.3°F
16
76%
3.2
1.60
📈 South Dakota Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 South Dakota Long-Term Climate Trends (1981–2025)
This chart shows how South Dakota'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 2 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in South Dakota
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in South Dakota.
Sioux Falls is the wettest city in South Dakota with approximately 652 mm of annual precipitation on average. View Sioux Falls weather history →
What is the warmest month in South Dakota?▼
Jul is the warmest month across South Dakota, with state-wide average highs of 100.6°F and average lows of 52.5°F.
How many cities in South Dakota have weather data?▼
TownPillar has historical weather data for 2 cities in South Dakota, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in South Dakota?▼
Jul is the sunniest month across South Dakota with an average solar radiation of 6.70 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 2 cities in South Dakota at monthly temporal resolution.