New Melones Dam Headquarters, CA Climate: Temperature & Rain by Month
Explore NOAA NCEI's 1991–2020 climate normals → and a clearly labeled PlainClimate comfort calculation
30-year climate normals (1991-2020) from New Melones Dam Headquarters's primary NOAA station, NEW MELONES DAM HQ.
The climate verdict for New Melones Dam Headquarters
New Melones Dam Headquarters, California has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 63°F. It scores 97/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 97% of them.
- 63°F
- average temperature, NOAA 1991-2020 normal
- 97/100
- comfort score, above 97% of station-mapped location scores
- 29.8"
- precipitation, annual total
- 294 days
- growing season, frost-free days
New Melones Dam Headquarters: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00046174 · New Melones Dam Headquarters, CA 63°F mean · 29.8" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 63°F
- RANK-UPPER #5,695
- PHOTO-FINISH ≈ Athens Ben Epps
- PRCP-MID 29.8"
- SWING-MID 34°F
- COMF-TOP 97/100
- LOAD-MIX H/C balanced
- STN-1 USC00046174
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Athens Ben Epps, GA (+ 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.
- New Melones Dam… (this station) 63°F
- Hot Clarksville, TX 63°F
- Near Athens Ben Epps, GA 63°F
- Near Batesburg, SC 63°F
- Near Clanton, AL 63°F
Climate Living Index · New Melones Dam Headquarters
New Melones Dam Headquarters: 85/100 · grade A
New Melones Dam Headquarters publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for New Melones Dam Headquarters, not an official NOAA rating. Rankings still use Comfort Score 97/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 294 days/year | 100/100 · A |
| Snowfall burden | 0.2 inches/year | 89/100 · A |
| Annual temperature balance | 63.0°F · 4.5° from 67.5°F | 86/100 · A |
| Precipitation balance | 29.8 in · 5.3 from 35 in | 81/100 · B |
| Normal heat + freeze calendar | 94 calendar days | 78/100 · B |
New Melones Dam Headquarters · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
New Melones Dam Headquarters is a temperate Köppen climate: Csa
Coldest-month mean 47.6°F and warmest-month mean 81.3°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
- 81.3°F
- Coldest month
- 47.6°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 New Melones Dam Headquarters sits across the climate record
Three NOAA fields for New Melones Dam Headquarters's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 17% warmest
- Among 6,861 stations, New Melones Dam Headquarters sits in the warmer third of annual means.
- Annual precipitation
- 40th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 85%
- Warmest-to-coldest month gap for New Melones Dam Headquarters is compact versus 6,861 complete station-years.
How New Melones Dam Headquarters compares across U.S. station-mapped locations
New Melones Dam Headquarters's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
97 Top 3% score exceeds 97% 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 | 57°F (14°C) | 38°F (3°C) | 48°F (9°C) | 5.8" | 0.0" | 3.9 | 0.0 |
| February | 61°F (16°C) | 40°F (4°C) | 50°F (10°C) | 4.8" | 0.0" | 2.2 | 0.0 |
| March | 65°F (18°C) | 44°F (6°C) | 54°F (12°C) | 4.8" | 0.2" | 0.5 | 0.0 |
| April | 70°F (21°C) | 46°F (8°C) | 58°F (14°C) | 2.6" | 0.0" | 0.2 | 0.4 |
| May | 79°F (26°C) | 52°F (11°C) | 66°F (19°C) | 1.5" | 0.0" | 0.1 | 5.2 |
| June | 89°F (32°C) | 59°F (15°C) | 74°F (23°C) | 0.4" | 0.0" | 0.0 | 15.9 |
| July | 97°F (36°C) | 65°F (19°C) | 81°F (27°C) | 0.0" | 0.0" | 0.0 | 27.8 |
| August | 96°F (36°C) | 65°F (18°C) | 80°F (27°C) | 0.0" | 0.0" | 0.0 | 27.2 |
| September | 91°F (33°C) | 60°F (16°C) | 76°F (24°C) | 0.2" | 0.0" | 0.0 | 18.1 |
| October | 80°F (27°C) | 52°F (11°C) | 66°F (19°C) | 1.5" | 0.0" | 0.0 | 3.7 |
| November | 66°F (19°C) | 44°F (7°C) | 55°F (13°C) | 2.9" | 0.0" | 1.1 | 0.0 |
| December | 57°F (14°C) | 38°F (3°C) | 48°F (9°C) | 5.2" | 0.0" | 5.1 | 0.0 |
The year, day by day
The year in New Melones Dam Headquarters runs from a mild 37°F around December 19 to 98°F at the peak near July 21, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 18 through September 19, covering 94 dates. The broader mild season, normal highs of 70°F or more, runs April 17 to November 6.
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 37°F around December 19.
Where the wet dates fall
The likeliest wet date is January 22, when 42% of years recorded at least a hundredth of an inch. The driest is July 28 at 1%. Summed across the calendar, that is about 75 wet dates a year.
The widest day
August 2 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 New Melones Dam Headquarters.
Where New Melones Dam Headquarters Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 94 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
New Melones Dam Headquarters 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
13.3 days with precipitation
11.3 days with precipitation
Snow: 0.2"
10.9 days with precipitation
6.9 days with precipitation
4.8 days with precipitation
1.9 days with precipitation
0.3 days with precipitation
0.4 days with precipitation
1.2 days with precipitation
4.0 days with precipitation
8.1 days with precipitation
12.0 days with precipitation
New Melones Dam Headquarters's wet season runs through the cold months
December, January and February carry 53% of the year's precipitation here, while June through August contribute 1%. 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 33.7°F seasonal spread.
- Wettest month
- January, 5.8"
- Driest month
- July, 0.0"
- Wettest three months
- January, December, February (53% 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 New Melones Dam Headquarters, it arrives in quantity
29.8" of precipitation falls across only about 75 wet days here, averaging 0.40 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 75 a year, 21% of all days
- Average depth per wet day
- 0.40 inches
- Most wet days
- January, about 13
- Fewest wet days
- July, about 0
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.
Snow reaches New Melones Dam Headquarters, but rarely amounts to much
The normals record 0.2 inches of snow a year here, most likely in March. 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.
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
February 20
50% probability date
Growing Season
294 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,547
Higher = more heating needed
Cooling Degree Days
1,842
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to New Melones Dam Headquarters 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 (63°F here).
- Clanton, AL 63°F · 0.0°F off
- Clarksville, TX 63°F · 0.0°F off
- Dermott, AR 63°F · 0.0°F off
- Elliott, SC 63°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (29.8" here), excluding temperature-peer places.
- Litchfield, MN 29.8" · 0.0" off
- Hutchinson, MN 29.8" · 0.0" off
- Breckenridge, TX 29.7" · 0.1" off
- Glenwood, WA 29.8" · 0.1" off
Data-derived climate profile
How New Melones Dam Headquarters's climate pattern fits together
mixed demand · moderate · mid swing
July and December mark the typical warm and cold ends of the calendar in New Melones Dam Headquarters's middle-range seasonal profile. The measured spread is 33.7°F. The annual average is 63°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Heating and cooling both register in New Melones Dam Headquarters's normal, at 2,547 and 1,842 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 294 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.
New Melones Dam Headquarters's 29.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Recorded annual snowfall is negligible. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from New Melones Dam Headquarters'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 New Melones Dam Headquarters, the bands are descriptive ranges rather than an official NOAA classification or a forecast.
Questions about New Melones Dam Headquarters's climate
How much rain does New Melones Dam Headquarters get? ▼
How many days above 90°F does New Melones Dam Headquarters get? ▼
How much energy does heating and cooling require in New Melones Dam Headquarters? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from New Melones Dam Headquarters's primary station: NEW MELONES DAM HQ (USC00046174). 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 New Melones Dam Headquarters; 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 New Melones Dam Headquarters 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.