Jess Valley, CA Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Jess Valley's primary NOAA station, JESS VALLEY.
The climate verdict for Jess Valley
Dryness leads the climate profile for Jess Valley, California, with 18.9 inches of precipitation a year. NOAA records an annual average of 46°F. At 44/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 10% of scores.
- 46°F
- average temperature, NOAA 1991-2020 normal
- 44/100
- comfort score, above 10% of station-mapped location scores
- 18.9"
- annual precipitation · 82" snow
- 96 days
- growing season, frost-free days
Jess Valley: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00044374 · Jess Valley, CA 46°F mean · 18.9" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-DRY · SWING-MID · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,578
- PHOTO-FINISH ≈ Lemolo Lake
- PRCP-DRY 18.9"
- SWING-MID 35°F
- COMF-LOW 44/100
- LOAD-HEAT 7,019 HDD
- STN-1 USC00044374
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Lemolo Lake, OR (+ 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.
- Jess Valley (this station) 46°F
- Hot Cabinet Gorge, ID 46°F
- Near Lemolo Lake, OR 46°F
- Near Sunset Crater N…, AZ 46°F
- Near Kumbrabow, WV 46°F
Climate Living Index · Jess Valley
Jess Valley: 18/100 · grade F
Jess Valley publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Jess Valley, not an official NOAA rating. Rankings still use Comfort Score 44/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 18.9 in · 16.1 from 35 in | 43/100 · D |
| Annual temperature balance | 46.1°F · 21.4° from 67.5°F | 24/100 · F |
| Normal heat + freeze calendar | 209 calendar days | 9/100 · F |
| Snowfall burden | 82.0 inches/year | 5/100 · F |
| Frost-free season | 96 days/year | 0/100 · F |
Jess Valley · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Jess Valley is a continental Köppen climate: Dsb
Coldest-month mean 30.7°F and warmest-month mean 65.3°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
- 65.3°F
- Coldest month
- 30.7°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 Jess Valley sits across the climate record
Three NOAA fields for Jess Valley's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 77%
- Among 6,861 stations, Jess Valley sits in the cooler third of annual means.
- Annual precipitation
- Drier than 74%
- Jess Valley's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 83%
- Warmest-to-coldest month gap for Jess Valley is compact versus 6,861 complete station-years.
How Jess Valley compares across U.S. station-mapped locations
Jess Valley's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 10th percentile score exceeds 10% 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%). This entry sits in this band.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 43°F (6°C) | 21°F (-6°C) | 32°F (0°C) | 1.9" | 12.5" | 28.5 | 0.0 |
| February | 45°F (7°C) | 21°F (-6°C) | 33°F (1°C) | 1.6" | 8.7" | 26.1 | 0.0 |
| March | 50°F (10°C) | 24°F (-5°C) | 37°F (3°C) | 1.9" | 14.5" | 27.1 | 0.0 |
| April | 55°F (13°C) | 27°F (-3°C) | 41°F (5°C) | 2.4" | 14.4" | 23.4 | 0.0 |
| May | 64°F (18°C) | 34°F (1°C) | 49°F (10°C) | 2.8" | 4.2" | 11.8 | 0.0 |
| June | 74°F (23°C) | 40°F (4°C) | 57°F (14°C) | 1.5" | 0.4" | 4.4 | 0.8 |
| July | 84°F (29°C) | 47°F (8°C) | 65°F (19°C) | 0.4" | 0.0" | 0.3 | 7.0 |
| August | 84°F (29°C) | 46°F (8°C) | 65°F (18°C) | 0.4" | 0.0" | 0.3 | 5.2 |
| September | 77°F (25°C) | 39°F (4°C) | 58°F (15°C) | 0.6" | 0.1" | 3.8 | 1.6 |
| October | 65°F (18°C) | 31°F (-1°C) | 48°F (9°C) | 1.1" | 2.9" | 16.2 | 0.1 |
| November | 51°F (11°C) | 25°F (-4°C) | 38°F (3°C) | 1.9" | 8.1" | 24.8 | 0.0 |
| December | 42°F (6°C) | 20°F (-7°C) | 31°F (-1°C) | 2.4" | 16.2" | 28.4 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 24, short of 90°F on every date, while 209 dates carry a normal low at or below freezing, the coldest 19°F near December 21.
The freezing stretch
The normal low stays at or below 32°F into May 5, then returns to freezing around October 10, covering 209 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.
Where the wet dates fall
The likeliest wet date is March 2, when 32% of years recorded at least a hundredth of an inch. The driest is August 18 at 6%. Summed across the calendar, that is about 80 wet dates a year.
The widest day
September 9 carries the biggest normal gap between afternoon and dawn, 38°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Jess Valley.
Where Jess Valley Stands Nationally
Winters bite deep and often: the normal nightly low dips to freezing or below on around 209 nights a year, placing this among the most frost-prone tenth of ranked stations.
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 38°F, sharper than nine in ten ranked stations see.
Jess Valley 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: 12.5"
9.1 days with precipitation
Snow: 8.7"
8.6 days with precipitation
Snow: 14.5"
10.0 days with precipitation
Snow: 14.4"
9.8 days with precipitation
Snow: 4.2"
8.3 days with precipitation
Snow: 0.4"
4.8 days with precipitation
1.6 days with precipitation
1.9 days with precipitation
Snow: 0.1"
2.7 days with precipitation
Snow: 2.9"
5.0 days with precipitation
Snow: 8.1"
8.1 days with precipitation
Snow: 16.2"
9.3 days with precipitation
Jess Valley spreads its precipitation across the year
Neither half of the year dominates here: June through August take 12% of the annual total and December through February 31%, with neither reaching the 35% that would mark a distinct wet season. Jess Valley has no dry season to plan around, though it does carry a 34.6°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 2.8" and August 0.4". The three wettest months together take 40% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
How Jess Valley's precipitation splits across the calendar
About 79 days a year record measurable precipitation here, carrying 18.9" between them, or roughly 0.24 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Jess Valley
Jess Valley averages 82.0 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 32 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 82.0 inches of depth.
- Days recording measurable snow: about 32 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 43% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
September 18
50% probability date
Last Spring Freeze
June 14
50% probability date
Growing Season
96 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,019
Higher = more heating needed
Cooling Degree Days
147
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Jess Valley 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 (46°F here).
- Burlington, WI 46°F · 0.0°F off
- Colstrip, MT 46°F · 0.0°F off
- Cottonwood, SD 46°F · 0.0°F off
- Deaver, WY 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (18.9" here), excluding temperature-peer places.
- Dupree, SD 18.9" · 0.0" off
- Keno, OR 18.9" · 0.0" off
- Lakin, KS 18.8" · 0.1" off
- Stratton, CO 18.8" · 0.1" off
Snow and freeze rhythm
When cold and snow define Jess Valley
heating led · dry · mid swing
Jess Valley's energy balance leans toward cold weather: 7,019 annual heating degree days against 147 for cooling. Its 34.6°F seasonal range still makes the monthly rows more useful than the annual average alone.
Only about 96 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.
-
1. Jess Valley coldest normal
December
The monthly mean of 31°F (-1°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Jess Valley typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Jess Valley snow peak
December
Jess Valley averages 82.0 inches of snow a year, with December the snowiest month on the normals.
Questions about Jess Valley's climate
How much snow does Jess Valley get? ▼
How cold does Jess Valley get in winter? ▼
How much energy does heating and cooling require in Jess Valley? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Jess Valley's primary station: JESS VALLEY (USC00044374). 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 Jess Valley; 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 Jess Valley 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.