Weather & Climate
Union County, Pennsylvania, United States
Overview
Available climate summaries for Union County. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
9.8°C
Summer Avg
21.8°C
Winter Avg
-2.5°C
Record High
38.7°C
Record Low
-24.3°C
Annual Precipitation
1127.9 mm
Avg Humidity
79%
Summer Humidity
73%
Winter Humidity
87%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.5° | -3.8° | -24.3° | 69.1 | 87% | 54 | 31.8 |
| Feb | 22.1° | -2.9° | -24.3° | 64.4 | 87% | 73 | 33.3 |
| Mar | 25.4° | 2° | -20.1° | 78.1 | 82% | 110 | 30.5 |
| Apr | 30.7° | 8.8° | -7° | 91.2 | 78% | 140 | 28.5 |
| May | 35.1° | 15.1° | -3.2° | 106 | 78% | 164 | 21.3 |
| Jun | 35.2° | 20° | 4° | 109.8 | 77% | 178 | 17.3 |
| Jul | 38.7° | 23° | 8.7° | 117.2 | 72% | 184 | 15.1 |
| Aug | 37.6° | 22.3° | 8.8° | 105.1 | 70% | 161 | 23.1 |
| Sep | 35.9° | 18.3° | 2.6° | 117.3 | 72% | 125 | 21.2 |
| Oct | 32.5° | 11.1° | -5.2° | 105.7 | 78% | 90 | 29.8 |
| Nov | 23.7° | 4.5° | -13.4° | 75.3 | 83% | 62 | 25.6 |
| Dec | 20.6° | -0.9° | -17.5° | 88.7 | 88% | 45 | 27.7 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.