Mammoth Lakes Ranger Station, 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 Mammoth Lakes Ranger Station's primary NOAA station, MAMMOTH LAKES RS.
The climate verdict for Mammoth Lakes Ranger Station
Mammoth Lakes Ranger Station, California has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 44°F. At 52/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 24% of scores.
- 44°F
- yearly average temperature, NOAA normal
- 52/100
- comfort score, above 24% of station-mapped location scores
- 23.7"
- yearly precipitation total
- 99 days
- frost-free days per growing season
Mammoth Lakes Ranger Station: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00045280 · Mammoth Lakes Ranger Station, CA 44°F mean · 23.7" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 44°F
- RANK-COOL #1,029
- PHOTO-FINISH ≈ Hatch
- PRCP-DRY 23.7"
- SWING-MID 35°F
- COMF-LOW 52/100
- LOAD-HEAT 7,722 HDD
- STN-1 USC00045280
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Hatch, UT (+ 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.
- Mammoth Lakes R… (this station) 44°F
- Hot Truckee Ranger…, CA 44°F
- Near Hatch, UT 44°F
- Near San Luis, CO 44°F
- Near Donner Mem Stat…, CA 44°F
Climate Living Index · Mammoth Lakes Ranger Station
Mammoth Lakes Ranger Station: 20/100 · grade F
Mammoth Lakes Ranger Station publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Mammoth Lakes Ranger Station, not an official NOAA rating. Rankings still use Comfort Score 52/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 23.7 in · 11.3 from 35 in | 60/100 · C |
| Annual temperature balance | 43.9°F · 23.6° from 67.5°F | 16/100 · F |
| Normal heat + freeze calendar | 211 calendar days | 9/100 · F |
| Frost-free season | 99 days/year | 0/100 · F |
Mammoth Lakes Ranger Station · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Mammoth Lakes Ranger Station is a continental Köppen climate: Dsb
Coldest-month mean 28.9°F and warmest-month mean 63.4°F place this station in continental, dry-summer, warm summer climates (Dsb). Class Dsb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, dry-summer, warm summer.
- Köppen code
- Dsb
- Group
- Continental
- Warmest month
- 63.4°F
- Coldest month
- 28.9°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 Mammoth Lakes Ranger Station sits across the climate record
Three NOAA fields for Mammoth Lakes Ranger Station's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 85%
- Among 6,861 stations, Mammoth Lakes Ranger Station sits in the cooler third of annual means.
- Annual precipitation
- 33rd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 83%
- Warmest-to-coldest month gap for Mammoth Lakes Ranger Station is compact versus 6,861 complete station-years.
How Mammoth Lakes Ranger Station compares across U.S. station-mapped locations
Mammoth Lakes Ranger Station's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
52 24th percentile score exceeds 24% 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%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 17°F (-9°C) | 29°F (-2°C) | 4.2" | 30.4 | 0.0 |
| February | 41°F (5°C) | 18°F (-8°C) | 29°F (-1°C) | 3.8" | 27.4 | 0.0 |
| March | 46°F (8°C) | 22°F (-5°C) | 34°F (1°C) | 3.3" | 28.8 | 0.0 |
| April | 51°F (11°C) | 27°F (-3°C) | 39°F (4°C) | 1.5" | 23.3 | 0.0 |
| May | 60°F (16°C) | 35°F (1°C) | 47°F (9°C) | 1.5" | 14.3 | 0.0 |
| June | 70°F (21°C) | 42°F (6°C) | 56°F (13°C) | 0.5" | 3.4 | 0.0 |
| July | 78°F (25°C) | 49°F (9°C) | 63°F (17°C) | 0.5" | 0.1 | 0.3 |
| August | 77°F (25°C) | 47°F (9°C) | 62°F (17°C) | 0.5" | 0.1 | 0.0 |
| September | 71°F (22°C) | 40°F (4°C) | 56°F (13°C) | 0.5" | 5.1 | 0.0 |
| October | 61°F (16°C) | 30°F (-1°C) | 46°F (8°C) | 1.4" | 21.9 | 0.0 |
| November | 49°F (10°C) | 23°F (-5°C) | 36°F (2°C) | 2.0" | 25.8 | 0.0 |
| December | 41°F (5°C) | 17°F (-8°C) | 29°F (-2°C) | 4.1" | 29.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 79°F around July 23, short of 90°F on every date, while 211 dates carry a normal low at or below freezing, the coldest 16°F near December 24.
The freezing stretch
The normal low stays at or below 32°F into May 5, then returns to freezing around October 8, covering 211 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.
The widest day
September 19 carries the biggest normal gap between afternoon and dawn, 32°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Mammoth Lakes Ranger Station.
Where Mammoth Lakes Ranger Station Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 211 nights a year, placing this among the most frost-prone tenth of ranked stations.
Mammoth Lakes Ranger Station 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
Mammoth Lakes Ranger Station'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 6%. 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 34.5°F seasonal spread.
- Wettest month
- January, 4.2"
- Driest month
- September, 0.5"
- Wettest three months
- January, December, February (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.
Frost Dates & Growing Season
First Fall Freeze
September 17
50% probability date
Last Spring Freeze
June 10
50% probability date
Growing Season
99 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,722
Higher = more heating needed
Cooling Degree Days
65
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside CA closest to Mammoth Lakes Ranger Station 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 (44°F here).
- Bethel, ME 44°F · 0.0°F off
- Carter, MT 44°F · 0.0°F off
- Colton, NY 44°F · 0.0°F off
- Dayton, WY 44°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (23.7" here), excluding temperature-peer places.
- Jetmore, KS 23.7" · 0.0" off
- Turton, SD 23.7" · 0.0" off
- Cascade, ID 23.8" · 0.0" off
- Crested Butte, CO 23.8" · 0.0" off
Data-derived climate profile
How Mammoth Lakes Ranger Station's climate pattern fits together
heating led · moderate · mid swing
Mammoth Lakes Ranger Station's energy balance leans toward cold weather: 7,722 annual heating degree days against 65 for cooling. Its 34.5°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 99 days are frost-free in a normal year. That short interval is consistent with the cold-season signal, but the measure does not predict the exact first or last freeze in any one year.
July and January mark the typical warm and cold ends of the calendar in Mammoth Lakes Ranger Station's middle-range seasonal profile. The measured spread is 34.5°F. The annual average is 44°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Mammoth Lakes Ranger Station's 23.7 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 Mammoth Lakes Ranger Station'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 Mammoth Lakes Ranger Station, not an official NOAA class or a year-ahead forecast.
Questions about Mammoth Lakes Ranger Station's climate
How much rain does Mammoth Lakes Ranger Station get? ▼
How cold does Mammoth Lakes Ranger Station get in winter? ▼
How much energy does heating and cooling require in Mammoth Lakes Ranger Station? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Mammoth Lakes Ranger Station's primary station: MAMMOTH LAKES RS (USC00045280). 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 Mammoth Lakes Ranger Station; 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 Mammoth Lakes Ranger Station 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.