San Luis 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 San Luis Dam's primary NOAA station, SAN LUIS DAM.
The climate verdict for San Luis Dam
Dryness leads the climate profile for San Luis Dam, California, with 10.4 inches of precipitation a year. NOAA records an annual average of 64°F. It scores 90/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 91% of them.
- 64°F
- annual average temperature (NOAA normal)
- 90/100
- comfort score, above 91% of station-mapped location scores
- 10.4"
- yearly precipitation total
- 318 days
- growing season, frost-free days
San Luis Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047846 · San Luis Dam, CA 64°F mean · 10.4" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 64°F
- RANK-UPPER #5,763
- PHOTO-FINISH ≈ Alvord
- PRCP-ARID 10.4"
- SWING-MID 31°F
- COMF-TOP 90/100
- LOAD-MIX H/C balanced
- STN-1 USC00047846
- 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.
- San Luis 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 · San Luis Dam
San Luis Dam: 75/100 · grade B
San Luis Dam publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for San Luis Dam, not an official NOAA rating. Rankings still use Comfort Score 90/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 318 days/year | 100/100 · A |
| Snowfall burden | 0.1 inches/year | 89/100 · A |
| Annual temperature balance | 63.5°F · 4.0° from 67.5°F | 88/100 · A |
| Normal heat + freeze calendar | 76 calendar days | 83/100 · B |
| Precipitation balance | 10.4 in · 24.6 from 35 in | 14/100 · F |
San Luis Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
San Luis Dam's normals sit in a dry climate class: BSk
Precipitation is low relative to temperature but above true desert thresholds: cold semi-arid steppe (BSk). Class BSk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold semi-arid steppe.
- Köppen code
- BSk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 78.7°F
- Coldest month
- 47.5°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 San Luis Dam sits across the climate record
Three NOAA fields for San Luis 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, San Luis Dam sits in the warmer third of annual means.
- Annual precipitation
- Drier than 93%
- San Luis Dam's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 89%
- Warmest-to-coldest month gap for San Luis Dam is compact versus 6,861 complete station-years.
How San Luis Dam compares across U.S. station-mapped locations
San Luis Dam's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
90 Top 9% score exceeds 91% 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%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
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 | 56°F (14°C) | 39°F (4°C) | 48°F (9°C) | 2.2" | 0.1" | 5.8 | 0.0 |
| February | 62°F (17°C) | 43°F (6°C) | 52°F (11°C) | 2.0" | 0.0" | 1.2 | 0.0 |
| March | 67°F (19°C) | 47°F (8°C) | 57°F (14°C) | 1.6" | 0.0" | 0.1 | 0.0 |
| April | 73°F (23°C) | 50°F (10°C) | 61°F (16°C) | 0.5" | 0.0" | 0.0 | 0.5 |
| May | 80°F (27°C) | 56°F (13°C) | 68°F (20°C) | 0.7" | 0.0" | 0.0 | 5.1 |
| June | 88°F (31°C) | 60°F (16°C) | 74°F (23°C) | 0.1" | 0.0" | 0.0 | 11.4 |
| July | 93°F (34°C) | 65°F (18°C) | 79°F (26°C) | 0.0" | 0.0" | 0.0 | 20.2 |
| August | 93°F (34°C) | 64°F (18°C) | 78°F (26°C) | 0.0" | 0.0" | 0.0 | 20.8 |
| September | 89°F (32°C) | 61°F (16°C) | 75°F (24°C) | 0.0" | 0.0" | 0.0 | 14.3 |
| October | 79°F (26°C) | 54°F (12°C) | 67°F (19°C) | 0.5" | 0.0" | 0.0 | 3.3 |
| November | 66°F (19°C) | 45°F (7°C) | 55°F (13°C) | 1.0" | 0.0" | 0.7 | 0.0 |
| December | 57°F (14°C) | 39°F (4°C) | 48°F (9°C) | 1.7" | 0.0" | 4.6 | 0.0 |
The year, day by day
The year in San Luis Dam runs from a mild 38°F around December 29 to 94°F at the peak near July 25, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 27 through September 10, covering 76 dates. The broader mild season, normal highs of 70°F or more, runs April 3 to November 5.
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 38°F around December 29.
Where the wet dates fall
The likeliest wet date is January 2, when 39% of years recorded at least a hundredth of an inch. The driest is July 14 at 1%. Summed across the calendar, that is about 60 wet dates a year.
The widest day
August 4 carries the biggest normal gap between afternoon and dawn, 28°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for San Luis Dam.
Where San Luis Dam Stands Nationally
Aridity defines the water calendar: about 11 inches in a normal year lands this among the driest tenth of ranked stations.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 76 days a year, more than four out of five ranked stations record.
San Luis 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 and snowfall
Snow: 0.1"
12.2 days with precipitation
10.9 days with precipitation
8.0 days with precipitation
4.9 days with precipitation
2.6 days with precipitation
0.6 days with precipitation
0.2 days with precipitation
0.3 days with precipitation
0.4 days with precipitation
2.5 days with precipitation
6.8 days with precipitation
10.4 days with precipitation
San Luis Dam's wet season runs through the cold months
December, January and February carry 56% of the year's precipitation here, while June through August contribute 2%. 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 31.2°F seasonal spread.
- Wettest month
- January, 2.2"
- Driest month
- July, 0.0"
- Wettest three months
- January, February, December (56% 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.
San Luis Dam is dry, and what does fall arrives gently
Only about 60 days a year record measurable precipitation here, 16% of the calendar, and they carry 10.4" between them. At roughly 0.17 inches on an average wet day, this is not the damp drizzle of a marine climate; it is an arid record in which precipitation is both uncommon and light when it appears.
The wettest month by count is January at about 12 wet days; the driest is July at about 0.
A low per-event average in a dry record is a statement about typical days only. Arid regions can still take a large share of a year's total from a single convective storm, which a normal cannot show.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, not the extremes within it.
Snow reaches San Luis Dam, but rarely amounts to much
The normals record 0.1 inches of snow a year here, most likely in January. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 0 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
December 11
50% probability date
Last Spring Freeze
January 27
50% probability date
Growing Season
318 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,235
Higher = more heating needed
Cooling Degree Days
1,696
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CA closest to San Luis 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 (10.4" here), excluding temperature-peer places.
- Jerome, ID 10.4" · 0.0" off
- Rio Rancho, NM 10.4" · 0.0" off
- Palisade, CO 10.5" · 0.0" off
- Shoshone, ID 10.5" · 0.0" off
Scarce-water calendar
Where San Luis Dam's limited precipitation lands
mixed demand · dry · mid swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 10.4 inches annually, within PlainClimate's dry band. Recorded annual snowfall is negligible. The monthly distribution matters because the total alone does not reveal the timing.
July and January mark the typical warm and cold ends of the calendar in San Luis Dam's middle-range seasonal profile. The measured spread is 31.2°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 San Luis Dam's normal, at 2,235 and 1,696 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.
San Luis Dam has a long frost-free window of roughly 318 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
San Luis Dam wettest normal
January
January concentrates the scarce annual total (10.4 inches).
San Luis Dam driest normal
July
July is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about San Luis Dam's climate
How dry is San Luis Dam? ▼
How many days above 90°F does San Luis Dam get? ▼
How much energy does heating and cooling require in San Luis Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from San Luis Dam's primary station: SAN LUIS DAM (USC00047846). 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 San Luis 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 San Luis 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.