Auburn, California climate: Normal weather by month, frost dates and records
Auburn's normal year runs from 37°F December nights to 93°F July afternoons, with 36.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.2°C, December lows of 3°C, July highs of 34°C, 917 mm of precipitation a year.
- NOAA stationAuburn
- Station IDUSC00040383
- Location38.91°N 121.08°W
- Elevation1,292 ft (394 m)
- From the centerunder 1 mile
- Population13,780
On October 22, the normal high in Auburn is 75°F and the normal low 50°F, and the chance of measurable rain or snow is 13%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Auburn.
- Jan 56° 38°
- Feb 59° 40°
- Mar 63° 42°
- Apr 68° 45°
- May 77° 52°
- Jun 86° 58°
- Jul 93° 63°
- Aug 92° 63°
- Sep 87° 60°
- Oct 77° 52°
- Nov 64° 43°
- 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 Auburn each month?
July is the warmest month, with normal highs of 93°F; December the coldest, with normal lows of 37°F. The most precipitation falls in January (7.01 in), the least in July (0.01 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. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 56°F | 38°F | 47.1°F | 7.01 | 11 | <1 | 6 | 9 h 40 min |
| February | 59°F | 40°F | 49.7°F | 6.50 | 10 | <1 | 3 | 10 h 40 min |
| March | 63°F | 42°F | 52.7°F | 6.12 | 9 | <1 | 1 | 11 h 50 min |
| April | 68°F | 45°F | 56.4°F | 2.84 | 7 | <1 | 1 | 13 h 10 min |
| May | 77°F | 52°F | 64.2°F | 1.65 | 5 | 2 | <1 | 14 h 20 min |
| June | 86°F | 58°F | 71.6°F | 0.41 | 2 | 9 | <1 | 14 h 50 min |
| July | 93°F | 63°F | 78.1°F | 0.01 | <1 | 20 | <1 | 14 h 40 min |
| August | 92°F | 63°F | 77.4°F | 0.07 | <1 | 19 | <1 | 13 h 40 min |
| September | 87°F | 60°F | 73.2°F | 0.24 | 1 | 11 | <1 | 12 h 30 min |
| October | 77°F | 52°F | 64.3°F | 1.42 | 3 | 2 | <1 | 11 h 20 min |
| November | 64°F | 43°F | 53.4°F | 3.05 | 7 | <1 | 1 | 10 h 10 min |
| December | 56°F | 37°F | 46.5°F | 6.80 | 11 | <1 | 8 | 9 h 30 min |
| Year (annual) | 73°F | 49°F | 61.2°F | 36.12 | 67 | 63 | 20 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 3°C | 8.4°C | 178 mm |
| February | 15°C | 4°C | 9.8°C | 165 mm |
| March | 17°C | 6°C | 11.5°C | 155 mm |
| April | 20°C | 7°C | 13.6°C | 72 mm |
| May | 25°C | 11°C | 17.9°C | 42 mm |
| June | 30°C | 14°C | 22.0°C | 10 mm |
| July | 34°C | 17°C | 25.6°C | 0 mm |
| August | 33°C | 17°C | 25.2°C | 2 mm |
| September | 30°C | 15°C | 22.9°C | 6 mm |
| October | 25°C | 11°C | 17.9°C | 36 mm |
| November | 18°C | 6°C | 11.9°C | 77 mm |
| December | 13°C | 3°C | 8.1°C | 173 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00040383; 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 Auburn?
Normal highs sit between 65°F and 85°F in April, May and October. Of those, October has the fewest days with rain (3).
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 USC00040383.
When is the last frost in Auburn?
In Auburn, the last spring frost (32°F) comes after February 25 in half of years and after April 7 in one year in ten; the first autumn frost comes before December 5 in half of years and before November 15 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
- February 251 year in 10 after April 7; 9 in 10 after January 15
- First autumn frost, half of years before
- December 51 year in 10 before November 15; 9 in 10 before December 31
NOAA puts the median frost-free season at 286 days, and the season without a hard freeze (28°F) at 344 days.
A hard freeze (28°F) comes after January 13 in half of springs and before December 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Auburn in zone 9b in ZIP code 95603.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00040383; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Auburn?
In a normal year in Auburn, 63 days a year reach 90°F (7 of them 100°F or more), 20 nights fall to 32°F or colder and 67 days bring measurable precipitation.
- Days at 90°F or more
- 63a normal year
- Days at 100°F or more
- 7a normal year
- Nights at 32°F or colder
- 20a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 67a normal year
The highest temperature in this station's record (since 1905) is 113°F, on July 15, 1972; the lowest is 16°F, on December 9, 1972.
The wettest calendar year on that record is 1983, with 64.87 in; the snowiest season is 1988–89, with 7.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00040383; records: ACIS (NOAA Regional Climate Centers), station USC00040383. Records use complete months only; a month missing more than three days is left out.
How sunny is Auburn?
Over a year 89% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Auburn, 5.2 kWh per square metre a day. July is the sunniest month (98%) and January the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.2 |
| February | 77% | 3.3 |
| March | 80% | 4.6 |
| April | 85% | 6.2 |
| May | 91% | 7.5 |
| June | 95% | 8.3 |
| July | 98% | 8.2 |
| August | 98% | 7.4 |
| September | 96% | 6.0 |
| October | 91% | 4.3 |
| November | 81% | 2.8 |
| December | 71% | 2.0 |
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 Auburn need?
A normal year in Auburn brings 2,813 heating degree days, 48% fewer than the median U.S. place (5,373), and 1,453 cooling degree days, 60% more than 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 4,541 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 556 | 0 |
| February | 428 | 0 |
| March | 382 | 1 |
| April | 268 | 12 |
| May | 113 | 88 |
| June | 24 | 222 |
| July | 1 | 405 |
| August | 1 | 385 |
| September | 13 | 257 |
| October | 103 | 80 |
| November | 350 | 3 |
| December | 573 | 0 |
| Year (annual) | 2,813 | 1,453 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00040383. 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.
How does Auburn's climate compare?
Auburn is warmer than 107 of the other 218 places with their own NOAA record in California, and wetter than 178. Across the 7,247 U.S. stations with normals, its annual mean of 61.2°F is warmer than 78%.
In the Köppen classification computed from these normals, Auburn 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 Auburn share this climate record?
11 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.
- Folsom, CAalso near: Placerville (17 mi, 59.8°F a year); Sacramento (22 mi, 61.8°F a year)88,091 people · 17 mi S
- Rocklin, CAalso near: Sacramento Metro Airport (20 mi, 61.2°F a year); Placerville (24 mi, 59.8°F a year)75,129 people · 11 mi SW
- Lincoln, CAalso near: Sacramento Metro Airport (20 mi, 61.2°F a year); Marysville (22 mi, 62.0°F a year)56,268 people · 11 mi W
- Orangevale, CA35,219 people · 17 mi SW
- Granite Bay, CA21,378 people · 11 mi SW
- North Auburn, CA13,833 people · 2 mi N
- Loomis, CA6,939 people · 9 mi SW
- Auburn Lake Trails, CA3,861 people · 6 mi E
- Meadow Vista, CA3,343 people · 7 mi N
- Newcastle, CA1,594 people · 4 mi SW
- Penryn, CA1,059 people · 6 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Auburn's climate
What is the coldest month in Auburn?
December, with a normal high of 56°F and a normal low of 37°F. The warmest is July (93°F by day, 63°F at night).
What is the rainiest month in Auburn?
January, with 7.01 in of precipitation in a normal year; the driest is July with 0.01 in.
What plant hardiness zone is Auburn in?
The USDA's 2023 map puts Auburn in zone 9b in ZIP code 95603.
How late can frost come in Auburn?
In half of years the last 32°F night comes after February 25; in one year in ten it comes after April 7. Waiting until April 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Auburn in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- Colfax, CA15 miles from this station, 59.3°F a year
- Georgetown, CA16 miles from this station, 58.2°F a year
- Placerville, CA21 miles from this station, 59.8°F a year
- Grass Valley, CA21 miles from this station, 56.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made