Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Eureka, Montana, United States
Overview
Climate data and monthly weather averages for Eureka.
Key Metrics
Annual Avg
2.3°C
Summer Avg
14.6°C
Winter Avg
-9.5°C
Record High
35.7°C
Record Low
-39.3°C
Annual Precipitation
888.7 mm
Avg Humidity
81%
Summer Humidity
65%
Winter Humidity
95%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 1.2° | -9.4° | -35.5° | 90.2 | 95% | 33 | 23 |
| Feb | 4.9° | -9.1° | -36.2° | 70 | 95% | 57 | 22.3 |
| Mar | 11.2° | -4.5° | -33.5° | 87.7 | 95% | 96 | 25.7 |
| Apr | 21° | 0.6° | -18.6° | 70.8 | 85% | 132 | 24.6 |
| May | 25.6° | 7.3° | -7.9° | 79.7 | 76% | 171 | 26 |
| Jun | 32.4° | 11.4° | -4.6° | 100.8 | 75% | 179 | 18.7 |
| Jul | 33.9° | 16.4° | 1.7° | 37.8 | 64% | 219 | 20.5 |
| Aug | 35.7° | 16.1° | 1.3° | 35.3 | 57% | 179 | 17.9 |
| Sep | 30.7° | 10.6° | -6.4° | 52.2 | 63% | 121 | 20.8 |
| Oct | 24.1° | 2.7° | -16.8° | 73.2 | 78% | 73 | 26.6 |
| Nov | 10.9° | -4.4° | -33.2° | 99.9 | 94% | 35 | 24.2 |
| Dec | 2.1° | -10° | -39.3° | 91.1 | 95% | 25 | 25 |
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.