Yreka, California climate: Normal weather by month, frost dates and records
Yreka's normal year runs from 27°F December nights to 93°F July afternoons, with 18.9 inches of precipitation and 12 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.9°C, December lows of −3°C, July highs of 34°C, 481 mm of precipitation a year.
- NOAA stationYreka
- Station IDUSC00049866
- Location41.70°N 122.64°W
- Elevation2,709 ft (826 m)
- Population7,686
On October 23, the normal high in Yreka is 66°F and the normal low 36°F, and the chance of measurable rain or snow is 20%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Yreka.
- Jan 46° 27°
- Feb 52° 29°
- Mar 58° 32°
- Apr 64° 37°
- May 74° 43°
- Jun 83° 49°
- Jul 93° 55°
- Aug 92° 54°
- Sep 84° 47°
- Oct 70° 38°
- Nov 54° 31°
- Dec 45° 27°
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 Yreka each month?
July is the warmest month, with normal highs of 93°F; December the coldest, with normal lows of 27°F. The most precipitation falls in December (3.71 in), the least in August (0.31 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 27°F | 36.7°F | 3.28 | 4.3 | 13 | <1 | 26 | 9 h 30 min |
| February | 52°F | 29°F | 40.4°F | 2.17 | 2.6 | 10 | <1 | 23 | 10 h 30 min |
| March | 58°F | 32°F | 45.2°F | 1.84 | 0.4 | 11 | <1 | 21 | 11 h 50 min |
| April | 64°F | 37°F | 50.4°F | 1.30 | 0.2 | 9 | <1 | 11 | 13 h 20 min |
| May | 74°F | 43°F | 58.6°F | 1.32 | 0.0 | 8 | 2 | 4 | 14 h 30 min |
| June | 83°F | 49°F | 65.8°F | 0.74 | 0.0 | 4 | 9 | <1 | 15 h 10 min |
| July | 93°F | 55°F | 74.2°F | 0.51 | 0.0 | 3 | 23 | <1 | 15 h |
| August | 92°F | 54°F | 73.0°F | 0.31 | 0.0 | 2 | 22 | <1 | 13 h 50 min |
| September | 84°F | 47°F | 65.7°F | 0.41 | 0.0 | 2 | 10 | 1 | 12 h 30 min |
| October | 70°F | 38°F | 53.7°F | 1.14 | 0.0 | 5 | 1 | 9 | 11 h 10 min |
| November | 54°F | 31°F | 42.5°F | 2.19 | 1.5 | 11 | <1 | 21 | 9 h 50 min |
| December | 45°F | 27°F | 36.0°F | 3.71 | 2.6 | 13 | <1 | 26 | 9 h 10 min |
| Year (annual) | 68°F | 39°F | 53.5°F | 18.92 | 11.6 | 91 | 67 | 142 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −3°C | 2.6°C | 83 mm | 11 cm |
| February | 11°C | −2°C | 4.7°C | 55 mm | 7 cm |
| March | 15°C | 0°C | 7.3°C | 47 mm | 1 cm |
| April | 18°C | 3°C | 10.2°C | 33 mm | 1 cm |
| May | 23°C | 6°C | 14.8°C | 34 mm | 0 cm |
| June | 28°C | 9°C | 18.8°C | 19 mm | 0 cm |
| July | 34°C | 13°C | 23.4°C | 13 mm | 0 cm |
| August | 33°C | 12°C | 22.8°C | 8 mm | 0 cm |
| September | 29°C | 8°C | 18.7°C | 10 mm | 0 cm |
| October | 21°C | 3°C | 12.1°C | 29 mm | 0 cm |
| November | 12°C | 0°C | 5.8°C | 56 mm | 4 cm |
| December | 7°C | −3°C | 2.2°C | 94 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00049866; 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 Yreka?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (2).
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 USC00049866.
When is the last frost in Yreka?
In Yreka, the last spring frost (32°F) comes after April 30 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 18 in half of years and before October 3 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
- April 301 year in 10 after May 20; 9 in 10 after April 14
- First autumn frost, half of years before
- October 181 year in 10 before October 3; 9 in 10 before November 2
NOAA puts the median frost-free season at 169 days, and the season without a hard freeze (28°F) at 202 days.
A hard freeze (28°F) comes after April 12 in half of springs and before November 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Yreka in zone 8a in ZIP code 96097, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Yreka's NOAA station is in zone 8a: the coldest night of a typical year reaches 10°F (25 complete years).
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00049866; 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.
How hot and how cold does it get in Yreka?
In a normal year in Yreka, 67 days a year reach 90°F (11 of them 100°F or more), 142 nights fall to 32°F or colder and 91 days bring measurable precipitation.
- Days at 90°F or more
- 67a normal year
- Days at 100°F or more
- 11a normal year
- Nights at 32°F or colder
- 142a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 91a normal year
- Days with 1 inch of snow or more
- 4a normal year
The highest temperature in this station's record (since 1893) is 112°F, on July 18, 1925; the lowest is −11°F, on January 22, 1937.
The wettest calendar year on that record is 1998, with 33.73 in; the snowiest season is 1955–56, with 60.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00049866; records: ACIS (NOAA Regional Climate Centers), station USC00049866. Records use complete months only; a month missing more than three days is left out.
How sunny is Yreka?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Yreka, 4.8 kWh per square metre a day. July is the sunniest month (94%) and December the cloudiest (64%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 1.9 |
| February | 71% | 2.9 |
| March | 71% | 4.0 |
| April | 76% | 5.6 |
| May | 81% | 6.9 |
| June | 89% | 8.0 |
| July | 94% | 8.1 |
| August | 94% | 7.1 |
| September | 92% | 5.7 |
| October | 85% | 3.8 |
| November | 72% | 2.3 |
| December | 64% | 1.6 |
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 Yreka need?
A normal year in Yreka brings 4,951 heating degree days, 8% fewer than the median U.S. place (5,373), and 787 cooling degree days, 13% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,983 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 877 | 0 |
| February | 690 | 0 |
| March | 614 | 0 |
| April | 439 | 1 |
| May | 227 | 30 |
| June | 82 | 105 |
| July | 9 | 294 |
| August | 8 | 256 |
| September | 76 | 95 |
| October | 356 | 6 |
| November | 673 | 0 |
| December | 899 | 0 |
| Year (annual) | 4,951 | 787 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00049866. 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 Yreka been warmer than normal lately?
2024 averaged 53.3°F, 0.2°F below the 1991-2020 normal of 53.5°F. 1 of the 2 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 54.7°F | +1.2°F | 14.66 | 23.6 |
| 2024 | 53.3°F | −0.2°F | 22.68 | 11.1 |
Over 87 complete years from 1895 to 2024, the station's annual mean temperature rose at a fitted 2.2°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00049866; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Yreka's climate compare?
Yreka is warmer than 35 of the other 218 places with their own NOAA record in California, and wetter than 127. Across the 7,247 U.S. stations with normals, its annual mean of 53.5°F is warmer than 55%.
In the Köppen classification computed from these normals, Yreka 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 Yreka share this climate record?
3 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.
- Fort Jones, CA669 people · 12 mi SW
- Grenada, CA231 people · 7 mi SE
- Gazelle, CA104 people · 15 mi SE
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 Yreka's climate
What is the coldest month in Yreka?
December, with a normal high of 45°F and a normal low of 27°F. The warmest is July (93°F by day, 55°F at night).
Does it snow in Yreka?
Yes: 12 inches in a normal year, falling on 7 days with 0.1 inch or more, the most in January (4.3 inches).
What is the rainiest month in Yreka?
December, with 3.71 in of precipitation in a normal year; the driest is August with 0.31 in.
What plant hardiness zone is Yreka in?
The USDA's 2023 map puts Yreka in zone 8a in ZIP code 96097, the nearest ZIP area. By the same method at Yreka's NOAA station, the coldest night of a typical year reaches 10°F (25 years, 1991-2020): zone 8a.
How late can frost come in Yreka?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 20. Waiting until May 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Montague, CA11 miles from this station, 52.8°F a year
- Copco #1 Dam, CA25 miles from this station, 53.8°F a year
- Callahan, CA27 miles from this station, 52.4°F a year
- Mount Shasta, CA30 miles from this station, 50.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made