Climateby Month

Tracy, CA climate by month

NOAA 1991-2020 normals · 51 ft elevation

Summers in Tracy are hot; winters are cool. Highs peak at 95°F in July and fall to 57°F in January. The wettest month is January (about 13 wet days) and the driest is July (about 0). Snow is rare. The most comfortable time to visit is April.

Warmest month
95°F
July normal high
Coldest month
38°F
December normal low
Wet days a year
60
12.4 in of precipitation
Muggy days a year
0
dew point 65°F or higher

How warm is Tracy?

Normal highs range from 57°F in January to 95°F in July.

20°40°60°80°100° January: normal high 57°F (14°C), low 39°F (4°C) 57° 39° February: normal high 63°F (17°C), low 41°F (5°C) March: normal high 69°F (21°C), low 44°F (7°C) April: normal high 75°F (24°C), low 47°F (8°C) May: normal high 83°F (28°C), low 53°F (12°C) June: normal high 90°F (32°C), low 58°F (14°C) July: normal high 95°F (35°C), low 61°F (16°C) 95° 61° August: normal high 94°F (34°C), low 60°F (16°C) September: normal high 90°F (32°C), low 58°F (14°C) October: normal high 80°F (27°C), low 51°F (11°C) November: normal high 67°F (19°C), low 43°F (6°C) December: normal high 57°F (14°C), low 38°F (3°C) JFMAMJJASOND

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

How rainy is Tracy?

January has the most wet days (about 13); the year brings about 12 in of precipitation.

January: 13 wet days 13 February: 10 wet days March: 8 wet days April: 5 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: 11 wet days JFMAMJJASOND

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

How humid is Tracy?

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 0 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 Stockton Metropolitan Airport, 15 mi NE 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: 14.5 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 Tracy, 1991-2020
MonthHighLowPrecip.Wet daysMuggy daysDaylight
January 57°F39°F 2.5 in13 0 9.9 h
February 63°F41°F 2.3 in10 0 10.8 h
March 69°F44°F 1.6 in8 0 12.0 h
April 75°F47°F 0.8 in5 0 13.2 h
May 83°F53°F 0.5 in3 0 14.2 h
June 90°F58°F 0.1 in1 0 14.7 h
July 95°F61°F 0.0 in0 0 14.5 h
August 94°F60°F 0.01 in0 0 13.6 h
September 90°F58°F 0.08 in1 0 12.4 h
October 80°F51°F 0.7 in3 0 11.2 h
November 67°F43°F 1.3 in7 0 10.2 h
December 57°F38°F 2.4 in11 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 Tracy

By our comfort score, the best month is April.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 46360
Feb 57960
Mar 741940
Apr 781931
May 701316
Jun 554015
Jul 441024
Aug 431022
Sep 473016
Oct 681614
Nov 671630
Dec 44261

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 Tracy

The last spring frost typically comes around Jan 19, and the first fall frost around Dec 10, leaving 330 frost-free days in a typical year.

Frost and freeze dates for Tracy
Typical date1 year in 10
Last spring frost (32°F)Jan 19after Feb 17
First fall frost (32°F)Dec 10before Nov 26
Last hard freeze (28°F)Jan 1after Jan 22
First hard freeze (28°F)Dec 22before Dec 4
Frost-free season330 daysunder 297 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: Tracy Pumping Plt (USC00049001), NOAA 1991-2020 freeze probabilities. Frost dates for every city in California.

Hottest and coldest readings, 1991-2020

The highest reading was 115°F (July 23, 2006); the lowest was 20°F (January 15, 2007, and 1 other day).

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

Near Tracy

Similar climates elsewhere

Where the numbers come from

  • Temperature, humidity and wind by hour and cloud cover: Stockton Metro Airport (USW00023237), 15 mi NE of the city center, 26 ft . NOAA normals and daily records, 1991-2020.
  • Rain, snowfall, snow depth and frost dates: Tracy Pumping Plt (USC00049001), 9.5 mi WNW of the city center, 61 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Stockton Metropolitan Airport (724920-23237), 15 mi NE of the city center, 27 ft . Hourly observations, 1991-2020.

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