World Resorts USA Napa Weather

Napa weather in January

Weather in Napa: January

Average day temperature: 54.6°F
Average night temperature: 44.0°F
Number of sunny days: 14 days
Day length: 9.6 - 10.3 hours
Number of rainy days: 3 days
Precipitation totals: 1.3 in.

Air temperature in January, °F

Show year:
2025
2024
2023
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
0
11
22
33
44
55
66
77
88
Day temperature   
Night temperature

The highest day temperature during January of 2025 was 67°F. At the same time the lowest night temperature was 33°F. Day and night temperature averages during January were 55.4°F and 42.4°F.

Sunny, partly cloudy and cloudy days
Sunny days
Partly cloudy days
Cloudy days
45%
26%
29%

Mostly all days in January are sunny but cloudy days are also possible.

Precipitation total in January, in.

jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
0.2
0.4
0.7
0.9
1.1
1.3
1.6
1.3
1.1
1.3
1.1
1.3

Precipitation total value in Napa in January is 1.3 in. Other months of the year show relatively similar values.

Wind speed in January, mph
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
1.0
2.0
3.0
4.1
5.1
6.1
7.1
3.8
3.8
4.0
4.4
4.9
5.5
5.9
5.7
4.9
4.8
4.5
3.8
3.8
4.0
4.4
4.9
5.5
5.9
5.7
4.9
4.8
4.5
4.0

The average wind speed value in January is 4.0 mph It makes January one of the least windy months of the year.

Average sunny hours
jan
feb
mar
apr
may
jun
jul
aug
sep
oct
nov
dec
0.0
2.3
4.6
6.9
9.2
11.6
13.9
16.2
4.8
7.0
8.8
10.8
12.8
13.5
13.1
12.2
9.8
7.2
7.1
4.8
7.0
8.8
10.8
12.8
13.5
13.1
12.2
9.8
7.2
7.1
5.9

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 5.9.

Best time for vacation in Napa

Sunniest months:
July 29 days
August 29 days
June 26 days
Warmest months:
August 87.1 °F
July 86.3 °F
September 85.3 °F
Coldest months:
December 54.5 °F
January 54.6 °F
February 57.9 °F
Rainiest months:
January 3 days
December 3 days
March 2 days
Windiest months:
June 5.9 mph
May 5.7 mph
July 5.5 mph

Napa on a weather map

Leaflet | Tiles © Esri
Places in USA:
Name
°F
+16°F
+21°F
+73°F
+73°F
+45°F
+52°F
+72°F
+18°F
+57°F
+54°F
+48°F
+63°F
+63°F
+28°F
+9°F
24 Hours Forecast
Napa
Local time: 03:47
February 20, thursday
0600
43°F
S
6 mph
0900
45°F
SE
3 mph
1200
59°F
SE
3 mph
1500
68°F
E
3 mph
1800
63°F
N
2 mph
2100
54°F
SE
1 mph
February 21, friday
0000
46°F
S
3 mph
0300
43°F
SW
3 mph
Units of measurement: °C / °F