Redding, California climate: Normal weather by month, frost dates and records
Redding's normal year runs from 37°F December nights to 100°F July afternoons, with 33.5 inches of precipitation and 3 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.4°C, December lows of 3°C, July highs of 38°C, 851 mm of precipitation a year.
- NOAA stationRedding Airport
- Station IDUSW00024257
- Location40.52°N 122.30°W
- Elevation497 ft (152 m)
- Population93,502
On October 23, the normal high in Redding is 76°F and the normal low 48°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Redding.
- Jan 57° 38°
- Feb 61° 40°
- Mar 66° 43°
- Apr 72° 47°
- May 82° 54°
- Jun 92° 62°
- Jul 100° 67°
- Aug 98° 64°
- Sep 92° 58°
- Oct 79° 50°
- Nov 64° 42°
- Dec 56° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Redding each month?
July is the warmest month, with normal highs of 100°F; December the coldest, with normal lows of 37°F. The most precipitation falls in December (6.31 in), the least in July (0.07 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 57°F | 38°F | 47.5°F | 6.04 | 1.1 | 12 | <1 | 8 | 9 h 30 min |
| February | 61°F | 40°F | 50.5°F | 5.48 | 0.8 | 11 | <1 | 4 | 10 h 40 min |
| March | 66°F | 43°F | 54.4°F | 4.62 | 0.0 | 12 | <1 | 2 | 11 h 50 min |
| April | 72°F | 47°F | 59.4°F | 2.41 | 0.0 | 8 | 1 | <1 | 13 h 10 min |
| May | 82°F | 54°F | 68.2°F | 1.81 | 0.0 | 6 | 7 | <1 | 14 h 20 min |
| June | 92°F | 62°F | 77.1°F | 0.75 | 0.0 | 3 | 18 | <1 | 15 h |
| July | 100°F | 67°F | 83.4°F | 0.07 | 0.0 | 1 | 29 | <1 | 14 h 50 min |
| August | 98°F | 64°F | 81.0°F | 0.13 | 0.0 | 1 | 27 | <1 | 13 h 50 min |
| September | 92°F | 58°F | 75.3°F | 0.45 | 0.0 | 1 | 19 | <1 | 12 h 30 min |
| October | 79°F | 50°F | 64.8°F | 1.92 | 0.0 | 5 | 5 | <1 | 11 h 10 min |
| November | 64°F | 42°F | 52.9°F | 3.53 | 0.0 | 9 | <1 | 3 | 10 h |
| December | 56°F | 37°F | 46.6°F | 6.31 | 0.7 | 13 | <1 | 10 | 9 h 20 min |
| Year (annual) | 77°F | 50°F | 63.4°F | 33.52 | 2.6 | 81 | 106 | 27 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 14°C | 3°C | 8.6°C | 153 mm | 3 cm |
| February | 16°C | 5°C | 10.3°C | 139 mm | 2 cm |
| March | 19°C | 6°C | 12.4°C | 117 mm | 0 cm |
| April | 22°C | 8°C | 15.2°C | 61 mm | 0 cm |
| May | 28°C | 12°C | 20.1°C | 46 mm | 0 cm |
| June | 33°C | 17°C | 25.1°C | 19 mm | 0 cm |
| July | 38°C | 19°C | 28.6°C | 2 mm | 0 cm |
| August | 37°C | 18°C | 27.2°C | 3 mm | 0 cm |
| September | 34°C | 15°C | 24.1°C | 11 mm | 0 cm |
| October | 26°C | 10°C | 18.2°C | 49 mm | 0 cm |
| November | 18°C | 5°C | 11.6°C | 90 mm | 0 cm |
| December | 13°C | 3°C | 8.1°C | 160 mm | 2 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024257; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Redding?
Normal highs sit between 65°F and 85°F in March, April, May and October. Of those, October has the fewest days with rain (5).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024257.
When is the last frost in Redding?
In Redding, the last spring frost (32°F) comes after March 3 in half of years and after April 9 in one year in ten; the first autumn frost comes before November 21 in half of years and before November 7 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- March 31 year in 10 after April 9; 9 in 10 after January 31
- First autumn frost, half of years before
- November 211 year in 10 before November 7; 9 in 10 before December 7
NOAA puts the median frost-free season at 261 days, and the season without a hard freeze (28°F) at 316 days.
A hard freeze (28°F) comes after January 27 in half of springs and before December 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Redding in zones 9a to 9b across its 3 ZIP code areas (9b in 96003, the largest). By the map's own method, the average of each year's coldest night over 1991-2020, Redding's NOAA station is in zone 9a: the coldest night of a typical year reaches 24°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00024257; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
What hardiness zone is each Redding ZIP code in?
The USDA's 2023 map gives each ZIP code area one zone. Redding's 3 ZIP code areas run from zone 9a to 9b: 1 in 9a and 2 in 9b. Each ZIP's frost dates are in the frost tool.
Source: USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; ZIP areas in the place: Census Bureau 2020 ZCTA-to-place relationship file. A ZIP area counts when at least a tenth of its land (and 0.5 km²) lies in the place.
How hot and how cold does it get in Redding?
In a normal year in Redding, 106 days a year reach 90°F (41 of them 100°F or more), 27 nights fall to 32°F or colder and 81 days bring measurable precipitation.
- Days at 90°F or more
- 106a normal year
- Days at 100°F or more
- 41a normal year
- Nights at 32°F or colder
- 27a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 81a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in Redding's official record (kept by the National Weather Service since 1893) is 119°F, on July 6, 2024; the lowest is 16°F, on January 17, 2012.
The wettest calendar year on that record is 1983, with 78.05 in; the snowiest season is 1949–50, with 37.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00024257; records: ACIS (NOAA Regional Climate Centers), NWS threaded record RDDthr. Records use complete months only; a month missing more than three days is left out.
How humid and windy is Redding, and how clear are its skies?
The summer (June-August) dew point averages 48°F. The muggiest month is July, with an average dew point of 50°F; the driest air comes in December (35°F). February is the windiest month (6.9 mph on average), and July has the most clear or nearly clear hours (95%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 38°F | 67% | 46% | 5.2 mph | 58% | 32% |
| February | 37°F | 62% | 42% | 6.9 mph | 55% | 31% |
| March | 39°F | 55% | 36% | 6.9 mph | 62% | 22% |
| April | 42°F | 47% | 28% | 6.7 mph | 71% | 16% |
| May | 47°F | 43% | 24% | 6.3 mph | 74% | 12% |
| June | 49°F | 35% | 18% | 6.2 mph | 90% | 3% |
| July | 50°F | 35% | 16% | 5.3 mph | 95% | 1% |
| August | 46°F | 34% | 16% | 5.4 mph | 94% | 2% |
| September | 43°F | 40% | 20% | 5.3 mph | 87% | 5% |
| October | 40°F | 53% | 31% | 5.2 mph | 72% | 17% |
| November | 37°F | 67% | 47% | 5.2 mph | 60% | 29% |
| December | 35°F | 71% | 51% | 5.1 mph | 56% | 35% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00024257. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is Redding?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Redding, 5.0 kWh per square metre a day. July is the sunniest month (96%) and December the cloudiest (66%). Among the 459 U.S. places of 50,000 or more, that ranks tied 89th (with 2 others) in sunshine.
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.0 |
| February | 73% | 3.0 |
| March | 73% | 4.2 |
| April | 80% | 5.8 |
| May | 85% | 7.1 |
| June | 92% | 8.1 |
| July | 96% | 8.2 |
| August | 96% | 7.2 |
| September | 94% | 5.8 |
| October | 87% | 4.0 |
| November | 76% | 2.4 |
| December | 66% | 1.7 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Redding need?
A normal year in Redding brings 2,576 heating degree days, 52% fewer than the median U.S. place (5,373), and 2,032 cooling degree days, 2.2 times the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,311 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 544 | 0 |
| February | 405 | 1 |
| March | 331 | 4 |
| April | 195 | 27 |
| May | 60 | 158 |
| June | 7 | 372 |
| July | 0 | 572 |
| August | 0 | 496 |
| September | 5 | 313 |
| October | 93 | 87 |
| November | 364 | 2 |
| December | 570 | 0 |
| Year (annual) | 2,576 | 2,032 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024257. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Redding been warmer than normal lately?
2025 averaged 64.8°F, 1.4°F above the 1991-2020 normal of 63.4°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 64.7°F | +1.3°F | 24.00 | 1.5 |
| 2022 | 65.2°F | +1.8°F | 16.92 | 0.0 |
| 2023 | 63.8°F | +0.4°F | 40.12 | 7.0 |
| 2024 | 65.9°F | +2.5°F | 41.38 | 0.0 |
| 2025 | 64.8°F | +1.4°F | 32.88 | – |
Over 134 complete years from 1875 to 2025, the station's annual mean temperature rose at a fitted 0.3°F per century (+0.02°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00024257; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Redding's climate compare?
Redding is warmer than 158 of the other 218 places with their own NOAA record in California, and wetter than 172. Across the 7,247 U.S. stations with normals, its annual mean of 63.4°F is warmer than 84%.
In the Köppen classification computed from these normals, Redding is Csa: temperate, dry-summer, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Redding share this climate record?
7 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Anderson, CA11,171 people · 5 mi S
- Cottonwood, CA7,170 people · 9 mi S
- Happy Valley, CA6,046 people · 7 mi SW
- Lake California, CA3,805 people · 12 mi SE
- Palo Cedro, CA3,561 people · 4 mi NE
- Millville, CA835 people · 7 mi NE
- Oak Run, CA534 people · 19 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Redding's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Redding. This page uses Redding Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Redding (12 mi WNW) USW00004222 | 19 mi NW | 1,418 ft | 60.4°F | 37°F | 96°F | 47.1 | – | March 19 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Redding's climate
What is the coldest month in Redding?
December, with a normal high of 56°F and a normal low of 37°F. The warmest is July (100°F by day, 67°F at night).
Does it snow in Redding?
Yes: 3 inches in a normal year, falling on 1 days with 0.1 inch or more, the most in January (1.1 inches).
What is the rainiest month in Redding?
December, with 6.31 in of precipitation in a normal year; the driest is July with 0.07 in.
What plant hardiness zone is Redding in?
The USDA's 2023 map puts Redding in zones 9a to 9b across its 3 ZIP code areas (9b in 96003, the largest). By the same method at Redding's NOAA station, the coldest night of a typical year reaches 24°F (30 years, 1991-2020): zone 9a.
How late can frost come in Redding?
In half of years the last 32°F night comes after March 3; in one year in ten it comes after April 9. Waiting until April 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Redding in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Whiskeytown Reservoir, CA14 miles from this station, 62.9°F a year
- Shasta, CA15 miles from this station, 63.5°F a year
- Red Bluff, CA25 miles from this station, 63.3°F a year
- Trinity River Hatchery, CA30 miles from this station, 56.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made