Spring (March–May): Average 51–59°F, mild climate, gradually decreasing rainfall, increasing sunny days. Common activities: Outdoor excursions, flower viewing, museum visits. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Summer (June–August): Average 62–66°F, warm and dry climate, abundant sunshine, very little rainfall. Common activities: Beach activities, picnics, outdoor sports. Recommended clothing: Short-sleeved shirts, shorts, sun hat, sunscreen.
Autumn (September–November): Average 51–62°F, comfortable and pleasant climate, larger temperature difference between morning and evening, gradually increasing rainfall. Common activities: Viewing red leaves, cycling, tasting local cuisine. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Winter (December–February): Average 48–50°F, cold and humid climate, relatively high rainfall. Common activities: Indoor activities, museum visits, shopping. Recommended clothing: Warm jacket, sweater, scarf, gloves.
Vallejo climatological average
Annual average temperature: approx. 57.2°F / Annual rainfall: approx. 565 mm / Summer humidity: 60%–70% / Rainiest month: December
Vallejo monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
49.6°F
116.6
February
49.1°F
72.9
March
51.8°F
99.7
April
55.4°F
26.4
May
59.7°F
17.2
June
64.2°F
0.7
July
65.8°F
0.1
August
67.1°F
0
September
65.8°F
6.4
October
61.9°F
3
November
52.2°F
64.6
December
49.5°F
157.9
Vallejo weather for the next seven days
12/15
Monday
Cloudy
59.4°F/36.9°F
12/16
Tuesday
Overcast
61°F/51.6°F
12/17
Wednesday
Fog
61°F/50°F
12/18
Thursday
Sunny
60.7°F/46.8°F
12/19
Friday
Patchy rain nearby
60.5°F/49.4°F
12/20
Saturday
Patchy rain nearby
61.6°F/56.3°F
12/21
Sunday
Moderate rain
59.5°F/56.3°F
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