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Weather & Climate

Union, Oregon, United States

Overview

Climate data and monthly weather averages for Union.

Key Metrics

Annual Avg
5.9°C
Summer Avg
16.9°C
Winter Avg
-4.3°C
Record High
40°C
Record Low
-26.5°C
Annual Precipitation
538.1 mm
Avg Humidity
71%
Summer Humidity
53%
Winter Humidity
92%

Monthly Averages

MonthHigh (°C)Avg (°C)Low (°C)Rain (mm)Humidity (%)Sunshine (h)Wind (kph)
Jan7.7°-4.9°-26.5°62.695%4629.3
Feb11.5°-3.3°-21.7°49.689%6631.4
Mar19.8°0.6°-17.4°60.480%10529.9
Apr25.6°3.7°-9.7°50.773%14226
May31.7°8.9°-5.9°60.169%18226.4
Jun36.8°13.1°-2.4°43.563%20423.1
Jul40°19.1°11.549%23619.7
Aug37.8°18.4°1.8°14.347%19820.7
Sep36.8°13.5°-3.8°19.252%14225
Oct30.8°6.4°-12.3°38.465%9125.7
Nov18.1°-0.1°-17.5°52.579%4928.3
Dec12°-4.7°-24.7°75.391%3533.3

Frequently Asked Questions

Sources: NASA POWER · Last updated: 2025

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