Shasta Dam, 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 Shasta Dam's primary NOAA station, SHASTA DAM.
The climate verdict for Shasta Dam
Water is the standout signal in Shasta Dam, California: 63.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 64°F. It scores 76/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 69% of them.
- 64°F
- annual average temperature (NOAA normal)
- 76/100
- comfort score, above 69% of station-mapped location scores
- 63.0"
- yearly precipitation total
- 323 days
- growing season, frost-free days
Shasta Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00048135 · Shasta Dam, CA 64°F mean · 63.0" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 64°F
- RANK-UPPER #5,763
- PHOTO-FINISH ≈ Alvord
- PRCP-WET 63.0"
- SWING-MID 36°F
- COMF-TOP 76/100
- LOAD-MIX H/C balanced
- STN-1 USC00048135
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Alvord, TX (+ 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.
- Shasta Dam (this station) 64°F
- Hot Ash Mtn, CA 64°F
- Near Alvord, TX 64°F
- Near Andrews, SC 64°F
- Near Arkansas Post, AR 64°F
Climate Living Index · Shasta Dam
Shasta Dam: 70/100 · grade B
Shasta Dam publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Shasta Dam, not an official NOAA rating. Rankings still use Comfort Score 76/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 323 days/year | 100/100 · A |
| Annual temperature balance | 63.5°F · 4.0° from 67.5°F | 88/100 · A |
| Normal heat + freeze calendar | 90 calendar days | 79/100 · B |
| Precipitation balance | 63.0 in · 28.0 from 35 in | 5/100 · F |
Shasta Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Shasta Dam is a temperate Köppen climate: Csa
Coldest-month mean 47.4°F and warmest-month mean 83.0°F place this station in temperate, dry-summer, hot summer climates (Csa). Class Csa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, hot summer.
- Köppen code
- Csa
- Group
- Temperate
- Warmest month
- 83.0°F
- Coldest month
- 47.4°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 Shasta Dam sits across the climate record
Three NOAA fields for Shasta Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 16% warmest
- Among 6,861 stations, Shasta Dam sits in the warmer third of annual means.
- Annual precipitation
- Top 4% wettest
- Shasta Dam's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 81%
- Warmest-to-coldest month gap for Shasta Dam is compact versus 6,861 complete station-years.
How Shasta Dam compares across U.S. station-mapped locations
Shasta Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
76 Top 31% score exceeds 69% 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%). This entry sits in this band.
- 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
Shasta Dam's measured station temperature trend
MethodologyAcross 62 complete annual observations from 1944 to 2023, SHASTA DAM warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Shasta Dam primary station fitted change +0.09 °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 | 55°F (13°C) | 41°F (5°C) | 48°F (9°C) | 10.5" | 2.1 | 0.0 |
| February | 59°F (15°C) | 42°F (5°C) | 50°F (10°C) | 11.4" | 1.0 | 0.0 |
| March | 63°F (17°C) | 44°F (7°C) | 54°F (12°C) | 9.2" | 0.2 | 0.0 |
| April | 70°F (21°C) | 48°F (9°C) | 59°F (15°C) | 4.6" | 0.2 | 0.3 |
| May | 79°F (26°C) | 55°F (13°C) | 67°F (19°C) | 2.9" | 0.0 | 4.5 |
| June | 88°F (31°C) | 63°F (17°C) | 76°F (24°C) | 1.5" | 0.0 | 13.8 |
| July | 97°F (36°C) | 69°F (21°C) | 83°F (28°C) | 0.1" | 0.0 | 26.1 |
| August | 96°F (36°C) | 68°F (20°C) | 82°F (28°C) | 0.2" | 0.0 | 25.3 |
| September | 90°F (32°C) | 63°F (17°C) | 77°F (25°C) | 0.5" | 0.0 | 16.6 |
| October | 78°F (25°C) | 55°F (13°C) | 66°F (19°C) | 3.4" | 0.0 | 3.0 |
| November | 62°F (17°C) | 46°F (8°C) | 54°F (12°C) | 6.6" | 0.2 | 0.0 |
| December | 54°F (12°C) | 41°F (5°C) | 47°F (9°C) | 12.0" | 1.9 | 0.0 |
The year, day by day
The year in Shasta Dam runs from a mild 40°F around December 22 to 98°F at the peak near July 22, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 21 through September 18, covering 90 dates. The broader mild season, normal highs of 70°F or more, runs April 18 to October 30.
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 40°F around December 22.
Where the wet dates fall
The likeliest wet date is February 27, when 46% of years recorded at least a hundredth of an inch. The driest is July 26 at 2%. Summed across the calendar, that is about 93 wet dates a year.
The widest day
July 26 carries the biggest normal gap between afternoon and dawn, 29°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Shasta Dam.
Where Shasta Dam Stands Nationally
This is one of the wettest normals climates ranked: about 63 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 90 days a year, more than four out of five ranked stations record.
Shasta Dam earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall
13.9 days with precipitation
12.7 days with precipitation
13.3 days with precipitation
9.6 days with precipitation
7.8 days with precipitation
3.3 days with precipitation
0.6 days with precipitation
0.7 days with precipitation
1.8 days with precipitation
5.0 days with precipitation
10.3 days with precipitation
13.5 days with precipitation
Shasta Dam's wet season runs through the cold months
December, January and February carry 54% of the year's precipitation here, while June through August contribute 3%. 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 35.6°F seasonal spread.
- Wettest month
- December, 12.0"
- Driest month
- July, 0.1"
- Wettest three months
- December, February, January (54% 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 Shasta Dam, it arrives in quantity
63.0" of precipitation falls across only about 93 wet days here, averaging 0.68 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 93 a year, 25% of all days
- Average depth per wet day
- 0.68 inches
- Most wet days
- January, about 14
- Fewest wet days
- July, about 1
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
December 28
50% probability date
Last Spring Freeze
February 8
50% probability date
Growing Season
323 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,582
Higher = more heating needed
Cooling Degree Days
2,071
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Shasta Dam 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 (64°F here).
- Alvord, TX 64°F · 0.0°F off
- Andrews, SC 64°F · 0.0°F off
- Bonham, TX 64°F · 0.0°F off
- Hemingway, SC 64°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (63.0" here), excluding temperature-peer places.
- Cascadia, OR 63.1" · 0.1" off
- Wewahitchka, FL 63.1" · 0.1" off
- Davis, WV 63.2" · 0.1" off
- Coalmont, TN 63.2" · 0.1" off
Data-derived climate profile
How Shasta Dam's climate pattern fits together
mixed demand · wet · mid swing
Water is prominent even though neither heating nor cooling wholly defines the record. Shasta Dam averages 63.0 inches of precipitation a year. Snowfall is not added to the interpretation because its annual value is missing. The monthly table supplies the seasonal distribution hidden by that annual total.
July and December mark the typical warm and cold ends of the calendar in Shasta Dam's middle-range seasonal profile. The measured spread is 35.6°F. The annual average is 64°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in Shasta Dam's normal, at 2,582 and 2,071 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.
The frost-free window extends for about 323 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
These labels group NOAA 1991-2020 normals from Shasta Dam's primary station, where heating and cooling demand are close enough that neither season sets the character on its own. On a balanced station like Shasta Dam, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about Shasta Dam's climate
How much rain does Shasta Dam get? ▼
How many days above 90°F does Shasta Dam get? ▼
How much energy does heating and cooling require in Shasta Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Shasta Dam's primary station: SHASTA DAM (USC00048135). 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 Shasta Dam; 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 Shasta Dam 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.