Mt Shasta, CA Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Mt Shasta's primary NOAA station, MT SHASTA - 2 stations mapped to the area.
The climate verdict for Mt Shasta
Mt Shasta, California has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 50°F. Its climate comfort score of 64/100 (good) lands mid-pack nationally, exceeding 49% of station-mapped location scores.
- 50°F
- average temperature, NOAA 1991-2020 normal
- 64/100
- comfort score, above 49% of station-mapped location scores
- 37.6"
- yearly precipitation total
- 159 days
- frost-free growing season
Mt Shasta: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00024215 · Mt Shasta, CA 50°F mean · 37.6" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-MID · LOAD-HEAT · STN-MULTI · BOOK-FULL
- TEMP-COOL 50°F
- RANK-MID #2,813
- PHOTO-FINISH ≈ Springerville
- PRCP-MID 37.6"
- SWING-MID 34°F
- COMF-MID 64/100
- LOAD-HEAT 5,628 HDD
- STN-MULTI USW00024215
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Springerville, AZ ( -0.1 °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.
- Hot Hat Creek, CA 51°F
- Mt Shasta (this station) 50°F
- Cold Springerville, AZ 50°F
- Near Transou, NC 50°F
- Near Bowman Dam, CA 50°F
Climate Living Index · Mt Shasta
Mt Shasta: 57/100 · grade C
Mt Shasta 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 Mt Shasta, not an official NOAA rating. Rankings still use Comfort Score 64/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 37.6 in · 2.6 from 35 in | 90/100 · A |
| Normal heat + freeze calendar | 126 calendar days | 61/100 · C |
| Summer moisture balance | 44.7°F mean dew point | 61/100 · C |
| Annual temperature balance | 50.3°F · 17.2° from 67.5°F | 42/100 · D |
| Frost-free season | 159 days/year | 33/100 · F |
Mt Shasta · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mt Shasta is a temperate Köppen climate: Csb
Coldest-month mean 34.9°F and warmest-month mean 68.4°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 68.4°F
- Coldest month
- 34.9°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 · heating-led station
Where Mt Shasta sits across the climate record
Three NOAA fields for Mt Shasta's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 41st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 53rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 85%
- Warmest-to-coldest month gap for Mt Shasta is compact versus 6,861 complete station-years.
How Mt Shasta compares across U.S. station-mapped locations
Mt Shasta's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 49th percentile score exceeds 49% 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%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 44°F (7°C) | 29°F (-2°C) | 36°F (2°C) | 6.3" | N/A | 23.4 | 0.0 |
| February | 47°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 6.4" | N/A | 21.0 | 0.0 |
| March | 53°F (11°C) | 32°F (0°C) | 42°F (6°C) | 5.6" | N/A | 18.3 | 0.0 |
| April | 59°F (15°C) | 35°F (2°C) | 47°F (8°C) | 2.9" | N/A | 10.7 | 0.0 |
| May | 69°F (20°C) | 41°F (5°C) | 55°F (13°C) | 2.1" | N/A | 2.1 | 0.5 |
| June | 76°F (24°C) | 47°F (8°C) | 62°F (16°C) | 1.1" | N/A | 0.2 | 2.8 |
| July | 85°F (30°C) | 52°F (11°C) | 68°F (20°C) | 0.3" | N/A | 0.0 | 11.9 |
| August | 85°F (29°C) | 50°F (10°C) | 67°F (20°C) | 0.2" | N/A | 0.0 | 9.1 |
| September | 78°F (26°C) | 45°F (7°C) | 62°F (16°C) | 0.5" | N/A | 0.5 | 3.1 |
| October | 65°F (18°C) | 38°F (3°C) | 51°F (11°C) | 2.0" | N/A | 6.2 | 0.0 |
| November | 51°F (10°C) | 31°F (0°C) | 41°F (5°C) | 3.6" | N/A | 18.1 | 0.0 |
| December | 42°F (6°C) | 28°F (-2°C) | 35°F (2°C) | 6.6" | N/A | 24.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 23, short of 90°F on every date, while 126 dates carry a normal low at or below freezing, the coldest 27°F near December 17.
The freezing stretch
The normal low stays at or below 32°F into March 16, then returns to freezing around November 12, covering 126 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is February 28, when 43% of years recorded at least a hundredth of an inch. The driest is August 13 at 6%. Summed across the calendar, that is about 96 wet dates a year.
The widest day
August 29 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 Mt Shasta.
Where Mt Shasta Stands Nationally
Daily temperature swings run wider than most of the country, peaking near 35°F between the normal high and low.
Mt Shasta earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
12.1 days with precipitation
12.1 days with precipitation
12.8 days with precipitation
10.9 days with precipitation
8.4 days with precipitation
4.1 days with precipitation
1.8 days with precipitation
1.8 days with precipitation
2.9 days with precipitation
5.9 days with precipitation
10.4 days with precipitation
12.9 days with precipitation
Mt Shasta's wet season runs through the cold months
December, January and February carry 51% of the year's precipitation here, while June through August contribute 4%. 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 33.5°F seasonal spread.
- Wettest month
- December, 6.6"
- Driest month
- August, 0.2"
- Wettest three months
- December, February, January (51% 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.
When it rains in Mt Shasta, it arrives in quantity
37.6" of precipitation falls across only about 96 wet days here, averaging 0.39 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 96 a year, 26% of all days
- Average depth per wet day
- 0.39 inches
- Most wet days
- December, about 13
- Fewest wet days
- July, about 2
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
October 12
50% probability date
Last Spring Freeze
May 6
50% probability date
Growing Season
159 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,628
Higher = more heating needed
Cooling Degree Days
309
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 | 71% | 3.2 | N/A | N/A |
| February | 68% | 3.4 | N/A | N/A |
| March | 62% | 3.9 | N/A | N/A |
| April | 54% | 4.0 | N/A | N/A |
| May | 54% | 3.6 | N/A | N/A |
| June | 48% | 3.1 | N/A | N/A |
| July | 46% | 2.2 | N/A | N/A |
| August | 46% | 2.6 | N/A | N/A |
| September | 52% | 2.8 | N/A | N/A |
| October | 64% | 2.9 | N/A | N/A |
| November | 73% | 3.1 | N/A | N/A |
| December | 73% | 3.2 | N/A | N/A |
Nationwide similar cities
Other rankable U.S. places outside CA closest to Mt Shasta 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 (50°F here).
- Bedford, IA 50°F · 0.0°F off
- Boulder, UT 50°F · 0.0°F off
- Central City, NE 50°F · 0.0°F off
- Chatham, MA 50°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (37.6" here), excluding temperature-peer places.
- Decorah, IA 37.6" · 0.0" off
- Marengo, IL 37.6" · 0.0" off
- Osage, IA 37.6" · 0.0" off
- Valley Falls, KS 37.6" · 0.0" off
Data-derived climate profile
How Mt Shasta's climate pattern fits together
heating led · moderate · mid swing
Mt Shasta's energy balance leans toward cold weather: 5,628 annual heating degree days against 309 for cooling. Its 33.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Mt Shasta's frost-free season lasts about 159 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and December mark the typical warm and cold ends of the calendar in Mt Shasta's middle-range seasonal profile. The measured spread is 33.5°F. The annual average is 50°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Mt Shasta's 37.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Mt Shasta's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Mt Shasta, not an official NOAA class or a year-ahead forecast.
Questions about Mt Shasta's climate
How much rain does Mt Shasta get? ▼
How cold does Mt Shasta get in winter? ▼
How much energy does heating and cooling require in Mt Shasta? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mt Shasta's primary station: MT SHASTA (USW00024215). 2 NOAA stations are mapped to the Mt Shasta area; the primary station's record is used for consistency. For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Mt Shasta; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Mt Shasta 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.