Potter Valley Powerhouse, 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 Potter Valley Powerhouse's primary NOAA station, POTTER VALLEY POWERHOUSE.
The climate verdict for Potter Valley Powerhouse
Water is the standout signal in Potter Valley Powerhouse, California: 45.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 59°F. It scores 83/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 81% of them.
- 59°F
- average temperature, NOAA 1991-2020 normal
- 83/100
- comfort score, above 81% of station-mapped location scores
- 45.0"
- precipitation, annual total
- 212 days
- frost-free growing season
Potter Valley Powerhouse: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047109 · Potter Valley Powerhouse, CA 59°F mean · 45.0" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 59°F
- RANK-UPPER #4,940
- PHOTO-FINISH ≈ Mt Locke
- PRCP-MID 45.0"
- SWING-NARROW 29°F
- COMF-TOP 83/100
- LOAD-HEAT 3,088 HDD
- STN-1 USC00047109
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Mt Locke, TX (+ 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 Merced, CA 60°F
- Potter Valley P… (this station) 59°F
- Cold Ukiah, CA 59°F
- Near Mt Locke, TX 59°F
- Near New Cuyama Fire, CA 59°F
Climate Living Index · Potter Valley Powerhouse
Potter Valley Powerhouse: 76/100 · grade B
Potter Valley Powerhouse publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Potter Valley Powerhouse, not an official NOAA rating. Rankings still use Comfort Score 83/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Normal heat + freeze calendar | 86 calendar days | 80/100 · B |
| Annual temperature balance | 59.1°F · 8.4° from 67.5°F | 73/100 · B |
| Frost-free season | 212 days/year | 73/100 · B |
| Precipitation balance | 45.0 in · 10.0 from 35 in | 65/100 · C |
Potter Valley Powerhouse · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Potter Valley Powerhouse is a temperate Köppen climate: Csa
Coldest-month mean 45.3°F and warmest-month mean 74.7°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
- 74.7°F
- Coldest month
- 45.3°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 Potter Valley Powerhouse sits across the climate record
Three NOAA fields for Potter Valley Powerhouse's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 28% warmest
- Among 6,861 stations, Potter Valley Powerhouse sits in the warmer third of annual means.
- Annual precipitation
- 68th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 91%
- Warmest-to-coldest month gap for Potter Valley Powerhouse is compact versus 6,861 complete station-years.
How Potter Valley Powerhouse compares across U.S. station-mapped locations
Potter Valley Powerhouse's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
83 Top 19% score exceeds 81% 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%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Potter Valley Powerhouse's measured station temperature trend
MethodologyAcross 44 complete annual observations from 1938 to 2025, POTTER VALLEY POWERHOUSE 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.
- Potter Valley Powerhouse primary station fitted change +0.10 °C/decade
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) | 35°F (2°C) | 46°F (8°C) | 8.2" | 0.0" | 13.2 | 0.0 |
| February | 61°F (16°C) | 36°F (2°C) | 49°F (9°C) | 7.7" | 0.0" | 9.0 | 0.0 |
| March | 66°F (19°C) | 39°F (4°C) | 52°F (11°C) | 6.3" | 0.0" | 5.8 | 0.0 |
| April | 71°F (22°C) | 41°F (5°C) | 56°F (13°C) | 3.4" | 0.0" | 1.7 | 0.6 |
| May | 79°F (26°C) | 45°F (7°C) | 62°F (17°C) | 1.9" | 0.0" | 0.1 | 3.9 |
| June | 87°F (31°C) | 50°F (10°C) | 68°F (20°C) | 0.5" | 0.0" | 0.0 | 11.0 |
| July | 95°F (35°C) | 54°F (12°C) | 75°F (24°C) | 0.0" | 0.0" | 0.0 | 23.6 |
| August | 94°F (35°C) | 53°F (12°C) | 73°F (23°C) | 0.1" | 0.0" | 0.0 | 22.9 |
| September | 90°F (32°C) | 49°F (9°C) | 70°F (21°C) | 0.3" | 0.0" | 0.0 | 16.9 |
| October | 79°F (26°C) | 43°F (6°C) | 61°F (16°C) | 1.9" | 0.0" | 0.9 | 3.3 |
| November | 64°F (18°C) | 38°F (3°C) | 51°F (11°C) | 5.0" | 0.0" | 7.8 | 0.0 |
| December | 56°F (13°C) | 35°F (1°C) | 45°F (7°C) | 9.8" | 0.0" | 15.1 | 0.0 |
The year, day by day
The year in Potter Valley Powerhouse runs from a mild 34°F around December 23 to 96°F at the peak near July 20, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 25 through September 18, covering 86 dates. The broader mild season, normal highs of 70°F or more, runs April 14 to November 3.
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 34°F around December 23.
Where the wet dates fall
The likeliest wet date is December 13, when 52% of years recorded at least a hundredth of an inch. The driest is July 25 at 1%. Summed across the calendar, that is about 96 wet dates a year.
The widest day
September 6 carries the biggest normal gap between afternoon and dawn, 42°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Potter Valley Powerhouse.
Where Potter Valley Powerhouse Stands Nationally
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 42°F, sharper than nine in ten ranked stations see.
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 86 days a year, more than four out of five ranked stations record.
Potter Valley Powerhouse 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
15.7 days with precipitation
14.0 days with precipitation
13.4 days with precipitation
9.0 days with precipitation
5.9 days with precipitation
1.9 days with precipitation
0.3 days with precipitation
0.5 days with precipitation
1.2 days with precipitation
5.2 days with precipitation
12.3 days with precipitation
16.1 days with precipitation
Potter Valley Powerhouse's wet season runs through the cold months
December, January and February carry 57% 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 an unusually narrow 29.4°F seasonal spread.
- Wettest month
- December, 9.8"
- Driest month
- July, 0.0"
- Wettest three months
- December, January, February (57% 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 Potter Valley Powerhouse, it arrives in quantity
45.0" of precipitation falls across only about 96 wet days here, averaging 0.47 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
- 0.47 inches
- Most wet days
- December, about 16
- 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.
Potter Valley Powerhouse's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
November 6
50% probability date
Last Spring Freeze
April 8
50% probability date
Growing Season
212 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,088
Higher = more heating needed
Cooling Degree Days
947
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Potter Valley Powerhouse 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 (59°F here).
- Durham, NC 59°F · 0.0°F off
- El Reno, OK 59°F · 0.0°F off
- Gage, OK 59°F · 0.0°F off
- Huntsville, AR 59°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (45.0" here), excluding temperature-peer places.
- Kingsport, TN 45.0" · 0.0" off
- Mattituck, NY 45.0" · 0.0" off
- Columbus, TX 45.0" · 0.0" off
- Fairfield, OH 45.0" · 0.0" off
Data-derived climate profile
How Potter Valley Powerhouse's climate pattern fits together
heating led · wet · low swing
Heating is the larger measured load in Potter Valley Powerhouse, at 3,088 degree days versus 947 for cooling. Unlike a strongly continental record, however, its 29.4°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Potter Valley Powerhouse's frost-free season lasts about 212 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
Potter Valley Powerhouse's 29.4°F seasonal spread is compact even though precipitation is abundant. July and December mark the typical warm and cold ends of the calendar. The annual average is 59°F. Temperature is relatively steady; the monthly rows show how rain and snow observations vary across the calendar.
Alongside its heating load, Potter Valley Powerhouse carries 45.0 inches of precipitation in a normal year, inside PlainClimate's wet range. Recorded annual snowfall is negligible. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Potter Valley Powerhouse'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 Potter Valley Powerhouse, not an official NOAA class or a year-ahead forecast.
Questions about Potter Valley Powerhouse's climate
How much rain does Potter Valley Powerhouse get? ▼
How many days above 90°F does Potter Valley Powerhouse get? ▼
How much energy does heating and cooling require in Potter Valley Powerhouse? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Potter Valley Powerhouse's primary station: POTTER VALLEY POWERHOUSE (USC00047109). 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 Potter Valley Powerhouse; 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 Potter Valley Powerhouse 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.