Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Custer, South Dakota, United States
Overview
Climate data and monthly weather averages for Custer.
Key Metrics
Annual Avg
6.4°C
Summer Avg
19.1°C
Winter Avg
-4.9°C
Record High
38.9°C
Record Low
-28.4°C
Annual Precipitation
485.9 mm
Avg Humidity
63%
Summer Humidity
56%
Winter Humidity
73%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 16.9° | -4.7° | -27.2° | 12.7 | 74% | 65 | 39.9 |
| Feb | 17.2° | -5.1° | -28.4° | 17.6 | 72% | 83 | 43.4 |
| Mar | 23.5° | 0.4° | -25.9° | 27.3 | 65% | 127 | 43.9 |
| Apr | 27.4° | 4.4° | -16.9° | 53.7 | 63% | 153 | 46.7 |
| May | 31.9° | 9.9° | -11.1° | 90.5 | 63% | 187 | 37.3 |
| Jun | 38.1° | 16.5° | -0.5° | 71.1 | 59% | 210 | 34.2 |
| Jul | 38.9° | 21.3° | 5.2° | 61.4 | 54% | 219 | 26.9 |
| Aug | 36.6° | 19.6° | 1.9° | 48.7 | 54% | 189 | 34.2 |
| Sep | 34.9° | 14.2° | -5.4° | 39.6 | 55% | 145 | 33.4 |
| Oct | 29.8° | 5.6° | -22.8° | 35.3 | 64% | 101 | 40 |
| Nov | 21.6° | 0.1° | -20.9° | 14.4 | 65% | 68 | 44 |
| Dec | 14.8° | -5° | -28.3° | 13.6 | 73% | 54 | 41.2 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
Subscribe to unlock the full sub-page depth for additional jurisdictions.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.