Stockton, CA Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Stockton's primary NOAA station, STOCKTON METRO AP.
The climate verdict for Stockton
Dryness leads the climate profile for Stockton, California, with 13.4 inches of precipitation a year. NOAA records an annual average of 63°F. It scores 85/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 85% of them.
- 63°F
- annual average temperature (NOAA normal)
- 85/100
- comfort score, above 85% of station-mapped location scores
- 13.4"
- precipitation, annual total
- 298 days
- frost-free days per growing season
Stockton: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00023237 · Stockton, CA 63°F mean · 13.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 63°F
- RANK-UPPER #5,695
- PHOTO-FINISH ≈ Athens Ben Epps
- PRCP-DRY 13.4"
- SWING-MID 30°F
- COMF-TOP 85/100
- LOAD-MIX H/C balanced
- STN-1 USW00023237
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Athens Ben Epps, GA (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every CA station list.
- Stockton (this station) 63°F
- Hot Clarksville, TX 63°F
- Near Athens Ben Epps, GA 63°F
- Near Batesburg, SC 63°F
- Near Clanton, AL 63°F
Climate Living Index · Stockton
Stockton: 77/100 · grade B
Stockton publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals); 1 missing weight rescale to 100.
PlainClimate-derived for Stockton, not an official NOAA rating. Rankings still use Comfort Score 85/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 298 days/year | 100/100 · A |
| Summer moisture balance | 52.5°F mean dew point | 98/100 · A |
| Annual temperature balance | 63.0°F · 4.5° from 67.5°F | 86/100 · A |
| Normal heat + freeze calendar | 97 calendar days | 77/100 · B |
| Precipitation balance | 13.4 in · 21.6 from 35 in | 23/100 · F |
Stockton · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Stockton's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 78.1°F
- Coldest month
- 47.7°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · balanced station
Where Stockton sits across the climate record
Three NOAA fields for Stockton's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 17% warmest
- Among 6,861 stations, Stockton sits in the warmer third of annual means.
- Annual precipitation
- Drier than 86%
- Stockton's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 90%
- Warmest-to-coldest month gap for Stockton is compact versus 6,861 complete station-years.
How Stockton compares across U.S. station-mapped locations
Stockton's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
85 Top 15% score exceeds 85% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Stockton's measured station temperature trend
MethodologyAcross 68 complete annual observations from 1942 to 2025, STOCKTON METRO AP warmed at a fitted rate of 0.25°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Stockton primary station fitted change +0.25 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 57°F (14°C) | 39°F (4°C) | 48°F (9°C) | 2.7" | 6.5 | 0.0 |
| February | 63°F (17°C) | 41°F (5°C) | 52°F (11°C) | 2.5" | 2.4 | 0.0 |
| March | 69°F (20°C) | 44°F (7°C) | 56°F (14°C) | 1.9" | 0.2 | 0.0 |
| April | 75°F (24°C) | 47°F (9°C) | 61°F (16°C) | 1.1" | 0.1 | 1.0 |
| May | 83°F (28°C) | 53°F (11°C) | 68°F (20°C) | 0.6" | 0.0 | 6.3 |
| June | 90°F (32°C) | 58°F (14°C) | 74°F (23°C) | 0.1" | 0.0 | 15.4 |
| July | 95°F (35°C) | 61°F (16°C) | 78°F (26°C) | 0.0" | 0.0 | 23.8 |
| August | 94°F (35°C) | 60°F (16°C) | 77°F (25°C) | 0.0" | 0.0 | 22.3 |
| September | 90°F (32°C) | 58°F (14°C) | 74°F (23°C) | 0.1" | 0.0 | 15.8 |
| October | 80°F (27°C) | 51°F (10°C) | 66°F (19°C) | 0.7" | 0.0 | 3.5 |
| November | 67°F (19°C) | 43°F (6°C) | 55°F (13°C) | 1.4" | 1.9 | 0.0 |
| December | 57°F (14°C) | 38°F (4°C) | 48°F (9°C) | 2.4" | 8.0 | 0.0 |
The year, day by day
The year in Stockton runs from a mild 38°F around December 18 to 96°F at the peak near July 16, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 14 through September 18, covering 97 dates. The broader mild season, normal highs of 70°F or more, runs March 27 to November 8.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 38°F around December 18.
Where the wet dates fall
The likeliest wet date is February 10, when 33% of years recorded at least a hundredth of an inch. The driest is July 27 at 1%. Summed across the calendar, that is about 57 wet dates a year.
The widest day
July 14 carries the biggest normal gap between afternoon and dawn, 35°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Stockton.
Where Stockton Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 97 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
A drier-than-most normal water year — around 14 inches, below what four out of five ranked stations collect.
Stockton earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
9.7 days with precipitation
9.2 days with precipitation
9.0 days with precipitation
5.3 days with precipitation
2.9 days with precipitation
1.0 days with precipitation
0.2 days with precipitation
0.2 days with precipitation
0.7 days with precipitation
2.8 days with precipitation
6.4 days with precipitation
9.1 days with precipitation
Stockton's wet season runs through the cold months
December, January and February carry 56% of the year's precipitation here, while June through August contribute 1%. That is the cool-season-dominant pattern of the West Coast and the higher inland West, where storm tracks swing south in winter and summer turns dry; the thermometer meanwhile shows a 30.4°F seasonal spread.
- Wettest month
- January, 2.7"
- Driest month
- July, 0.0"
- Wettest three months
- January, February, December (56% of the year)
Shares are computed from this station's own 1991-2020 monthly precipitation normals. A cool-season label means the December-February share reaches 35%. Where snow falls, the monthly figures above report liquid-equivalent precipitation, so a wet winter month is not necessarily a rainy one.
How Stockton's precipitation splits across the calendar
About 57 days a year record measurable precipitation here, carrying 13.4" between them, or roughly 0.24 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Frost Dates & Growing Season
First Fall Freeze
December 1
50% probability date
Last Spring Freeze
February 6
50% probability date
Growing Season
298 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,260
Higher = more heating needed
Cooling Degree Days
1,566
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 80% | 6.4 | 57% | 24% |
| February | 72% | 7.0 | 57% | 21% |
| March | 64% | 8.1 | 67% | 13% |
| April | 55% | 9.2 | 73% | 9% |
| May | 52% | 9.8 | 82% | 4% |
| June | 47% | 9.0 | 92% | 2% |
| July | 48% | 8.4 | 94% | 0% |
| August | 48% | 7.8 | 94% | 1% |
| September | 51% | 6.7 | 89% | 2% |
| October | 61% | 5.6 | 77% | 9% |
| November | 75% | 6.1 | 61% | 20% |
| December | 81% | 6.5 | 55% | 29% |
Nationwide similar cities
Other rankable U.S. places outside CA closest to Stockton on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (63°F here).
- Clanton, AL 63°F · 0.0°F off
- Clarksville, TX 63°F · 0.0°F off
- Dermott, AR 63°F · 0.0°F off
- Elliott, SC 63°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (13.4" here), excluding temperature-peer places.
- Weiser, ID 13.4" · 0.0" off
- Chinook, MT 13.4" · 0.0" off
- Glasgow, MT 13.4" · 0.0" off
- Briggsdale, CO 13.4" · 0.0" off
Scarce-water calendar
Where Stockton's limited precipitation lands
mixed demand · dry · mid swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 13.4 inches annually, within PlainClimate's dry band. Snowfall is not added to the interpretation because its annual value is missing. The monthly distribution matters because the total alone does not reveal the timing.
July and December mark the typical warm and cold ends of the calendar in Stockton's middle-range seasonal profile. The measured spread is 30.4°F. The annual average is 63°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Stockton's normal, at 2,260 and 1,566 degree days respectively. Neither total exceeds the other by more than two to one, so the record is better read as a mixed-demand calendar than as heating-led or cooling-led.
Stockton has a long frost-free window of roughly 298 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
Stockton wettest normal
January
January concentrates the scarce annual total (13.4 inches).
Stockton driest normal
July
July is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Stockton's climate
How dry is Stockton? ▼
How many days above 90°F does Stockton get? ▼
How much energy does heating and cooling require in Stockton? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Stockton's primary station: STOCKTON METRO AP (USW00023237). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0675000). Match rule for Stockton: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Stockton comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.