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Mercer County
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Mercer County Weather, Climate and Best Time to Visit
Data source：Meteostat
Update date：2025-09
Mercer County year round climate
- Spring (March–May): Average 4.8–16.2°C, variable climate, sometimes warm and comfortable, sometimes cold and humid, with heavier rainfall. Common activities: Outdoor walks (be mindful of weather changes), flower viewing. Recommended clothing: Layered clothing, jacket, sweater, long-sleeved shirt.
- Summer (June–August): Average 19.9–22.5°C, warm and humid, with the most rainfall in July. Common activities: Picnics, outdoor activities (be mindful of sun protection and rain). Recommended clothing: Breathable short-sleeved clothing, light pants, rain gear.
- Autumn (September–November): Average 11.9–18.4°C, comfortable and pleasant climate, rainfall gradually decreases. Common activities: Maple leaf viewing (if maple leaves are present locally), hiking. Recommended clothing: Light jacket, long-sleeved shirt.
- Winter (December–February): Average -1.3–2.0°C, cold and dry, low probability of snowfall. Common activities: Indoor activities, skiing (check for nearby suitable ski resorts). Recommended clothing: Thick coat, hat, scarf, gloves.
Mercer County climatological average
Annual average temperature: approx. 11°C / Annual rainfall: approx. 994 mm / Summer humidity: 65%–75% / Rainiest month: July
Mercer County monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-1.3°C
100
February
1.5°C
69.7
March
4.8°C
102
April
10.6°C
101
May
16.2°C
95
June
19.9°C
57.3
July
22.5°C
115
August
21.5°C
79.3
September
18.4°C
64
October
11.9°C
59.3
November
6.5°C
83
December
2°C
69.3
Mercer County weather for the next seven days
1/28
Wednesday
Light freezing rain
-11.5°C/-22.2°C
1/29
Thursday
Overcast
-10.3°C/-18.5°C
1/30
Friday
Partly Cloudy
-10.4°C/-27.3°C
1/31
Saturday
Partly Cloudy
-11.3°C/-27.6°C
2/1
Sunday
Freezing fog
-9.9°C/-22.6°C
2/2
Monday
Freezing fog
-3.2°C/-20.2°C
2/3
Tuesday
Light snow
-0.6°C/-4.4°C
