Climateby Month

San Jose, CA climate by month

NOAA 1991-2020 normals · 81 ft elevation

San Jose has warm summers and cool winters. Highs peak at 81°F in August and fall to 60°F in December. The wettest month is February (about 10 wet days) and the driest is July (about 0). Snow is rare. By our comfort score the best month is May.

Warmest month
81°F
August normal high
Coldest month
42°F
December normal low
Wet days a year
59
13.5 in of precipitation
Muggy days a year
0
dew point 65°F or higher

How warm is San Jose?

Normal highs range from 60°F in December to 81°F in August.

40°50°60°70°80°90° January: normal high 60°F (16°C), low 42°F (6°C) 60° 42° February: normal high 62°F (17°C), low 44°F (7°C) March: normal high 66°F (19°C), low 46°F (8°C) April: normal high 69°F (21°C), low 48°F (9°C) May: normal high 74°F (23°C), low 52°F (11°C) June: normal high 79°F (26°C), low 56°F (13°C) July: normal high 81°F (27°C), low 58°F (14°C) 81° 58° August: normal high 81°F (27°C), low 59°F (15°C) September: normal high 81°F (27°C), low 57°F (14°C) October: normal high 76°F (24°C), low 53°F (12°C) November: normal high 66°F (19°C), low 46°F (8°C) December: normal high 60°F (16°C), low 42°F (6°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is San Jose?

February has the most wet days (about 10); the year brings about 13 in of precipitation.

January: 9 wet days February: 10 wet days 10 March: 9 wet days April: 6 wet days May: 3 wet days June: 1 wet days July: 0 wet days 0 August: 0 wet days September: 1 wet days October: 3 wet days November: 7 wet days December: 10 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How humid is San Jose?

Muggy days (dew point 65°F or higher) are rare in any month.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 0 muggy days June: 0 muggy days July: 0 muggy days August: 0 muggy days September: 0 muggy days October: 0 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at N Y. Mineta Sn Jo Intl Apt, 2.1 mi NW of the city center.

How much daylight?

Daylight ranges from about 9.6 hours in December to 14.7 hours in June.

January: 9.9 hours of daylight February: 10.8 hours of daylight March: 12.0 hours of daylight April: 13.2 hours of daylight May: 14.2 hours of daylight June: 14.7 hours of daylight 14.7 July: 14.4 hours of daylight August: 13.6 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.2 hours of daylight December: 9.6 hours of daylight 9.6 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for San Jose, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 60°F42°F 2.8 in9 0 9.9 h
February 62°F44°F 2.7 in10 0 10.8 h
March 66°F46°F 2.1 in9 0 12.0 h
April 69°F48°F 1.1 in6 0 13.2 h
May 74°F52°F 0.4 in3 0 14.2 h
June 79°F56°F 0.2 in1 0 14.7 h
July 81°F58°F 0.0 in0 0 14.4 h
August 81°F59°F 0.05 in0 0 13.6 h
September 81°F57°F 0.07 in1 0 12.4 h
October 76°F53°F 0.5 in3 0 11.2 h
November 66°F46°F 1.3 in7 0 10.2 h
December 60°F42°F 2.3 in10 0 9.6 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit San Jose

By our comfort score, the best month is May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 51650
Feb 58960
Mar 691650
Apr 761830
May 872411
Jun 821903
Jul 781603
Aug 761703
Sep 731705
Oct 772211
Nov 681730
Dec 49550

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in San Jose

The last spring frost typically comes around Jan 12, and the first fall frost around Dec 22, leaving 347 frost-free days in a typical year.

Frost and freeze dates for San Jose
Typical date1 year in 10
Last spring frost (32°F)Jan 12after Feb 14
First fall frost (32°F)Dec 22before Dec 1
Hard freeze (28°F)in about 20% of years; no typical date
Frost-free season347 daysunder 313 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: San Jose (USW00023293), NOAA 1991-2020 freeze probabilities. Frost dates for every city in California.

Hottest and coldest readings, 1991-2020

The highest reading was 108°F (September 1, 2017); the lowest was 24°F (December 24, 1998).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near San Jose

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain and frost dates: San Jose (USW00023293), 2.1 mi NW of the city center, 51 ft . NOAA normals and daily records, 1991-2020.
  • Snowfall and snow depth: San Jose (USC00047821), 0.8 mi NNW of the city center, 67 ft . NOAA normals and daily records, 1991-2020.
  • Humidity and wind by hour and cloud cover: San Francisco Intl Airport (USW00023234), 32 mi NW of the city center, 8 ft (73 ft lower than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: N Y. Mineta Sn Jo Intl Apt (724945-23293), 2.1 mi NW of the city center, 49 ft . Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error