Johnson Valley, 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 Johnson Valley's primary NOAA station, JOHNSON VALLEY.
The climate verdict for Johnson Valley
Dryness leads the climate profile for Johnson Valley, California, with 5.6 inches of precipitation a year. NOAA records an annual average of 63°F. Its climate comfort score of 73/100 (good) lands mid-pack nationally, exceeding 66% of station-mapped location scores.
- 63°F
- annual average temperature (NOAA normal)
- 73/100
- comfort score, above 66% of station-mapped location scores
- 5.6"
- yearly precipitation total
- 273 days
- frost-free days per growing season
Johnson Valley: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00044394 · Johnson Valley, CA 63°F mean · 5.6" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-ARID · SWING-MID · COMF-MID · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 63°F
- RANK-UPPER #5,763
- PHOTO-FINISH ≈ Allendale
- PRCP-ARID 5.6"
- SWING-MID 38°F
- COMF-MID 73/100
- LOAD-MIX H/C balanced
- STN-1 USC00044394
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Allendale, SC (+ 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.
- Johnson Valley (this station) 63°F
- Hot Carlsbad Cavern…, NM 63°F
- Near Allendale, SC 63°F
- Near Bankhead L&d, AL 63°F
- Near Canton, MS 63°F
Climate Living Index · Johnson Valley
Johnson Valley: 68/100 · grade C
Johnson Valley publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Johnson Valley, not an official NOAA rating. Rankings still use Comfort Score 73/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 273 days/year | 95/100 · A |
| Annual temperature balance | 63.4°F · 4.1° from 67.5°F | 88/100 · A |
| Normal heat + freeze calendar | 100 calendar days | 76/100 · B |
| Precipitation balance | 5.6 in · 29.4 from 35 in | 2/100 · F |
Johnson Valley · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Johnson Valley's normals sit in a dry climate class: BWk
Annual precipitation falls well below the aridity threshold for this temperature regime, so the normals classify as cold desert (BWk). Class BWk is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: dry (arid or semi-arid), specifically cold desert.
- Köppen code
- BWk
- Group
- Dry (arid or semi-arid)
- Warmest month
- 83.2°F
- Coldest month
- 44.8°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 Johnson Valley sits across the climate record
Three NOAA fields for Johnson Valley'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, Johnson Valley sits in the warmer third of annual means.
- Annual precipitation
- Drier than 99%
- Johnson Valley's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 71%
- Warmest-to-coldest month gap for Johnson Valley is compact versus 6,861 complete station-years.
How Johnson Valley compares across U.S. station-mapped locations
Johnson Valley's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
73 Top 34% score exceeds 66% 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%). This entry sits in this band.
- 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 | 57°F (14°C) | 38°F (3°C) | 47°F (8°C) | 1.4" | 6.2 | 0.0 |
| February | 60°F (15°C) | 39°F (4°C) | 49°F (9°C) | 1.3" | 6.8 | 0.0 |
| March | 67°F (19°C) | 42°F (6°C) | 54°F (12°C) | 0.5" | 1.9 | 0.0 |
| April | 74°F (23°C) | 47°F (8°C) | 60°F (16°C) | 0.3" | 0.2 | 0.8 |
| May | 82°F (28°C) | 54°F (12°C) | 68°F (20°C) | 0.2" | 0.0 | 6.7 |
| June | 92°F (34°C) | 63°F (17°C) | 78°F (25°C) | 0.0" | 0.0 | 22.7 |
| July | 97°F (36°C) | 69°F (21°C) | 83°F (28°C) | 0.3" | 0.0 | 29.7 |
| August | 97°F (36°C) | 69°F (20°C) | 83°F (28°C) | 0.3" | 0.0 | 29.2 |
| September | 90°F (32°C) | 62°F (17°C) | 76°F (24°C) | 0.2" | 0.0 | 19.3 |
| October | 78°F (26°C) | 52°F (11°C) | 65°F (18°C) | 0.4" | 0.2 | 1.9 |
| November | 65°F (18°C) | 42°F (5°C) | 53°F (12°C) | 0.2" | 1.9 | 0.0 |
| December | 55°F (13°C) | 35°F (2°C) | 45°F (7°C) | 0.5" | 10.6 | 0.0 |
The year, day by day
The year in Johnson Valley runs from a mild 34°F around December 13 to 98°F at the peak near July 18, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from June 8 through September 15, covering 100 dates. The broader mild season, normal highs of 70°F or more, runs March 30 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 34°F around December 13.
The widest day
June 13 carries the biggest normal gap between afternoon and dawn, 30°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Johnson Valley.
Where Johnson Valley Stands Nationally
Summers here run among the most heat-heavy normals calendars in the country: on about 100 days a year the normal daily high itself reaches 90°F — a count fewer than one station in ten exceeds.
Aridity defines the water calendar: about 6 inches in a normal year lands this among the driest tenth of ranked stations.
Johnson 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
Johnson Valley'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 11%. 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 38.4°F seasonal spread.
- Wettest month
- January, 1.4"
- Driest month
- June, 0.0"
- Wettest three months
- January, February, March (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.
Frost Dates & Growing Season
First Fall Freeze
November 29
50% probability date
Last Spring Freeze
March 1
50% probability date
Growing Season
273 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,643
Higher = more heating needed
Cooling Degree Days
2,107
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Johnson 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 (63°F here).
- Allendale, SC 63°F · 0.0°F off
- Canton, MS 63°F · 0.0°F off
- Emory, TX 63°F · 0.0°F off
- Jal, NM 63°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (5.6" here), excluding temperature-peer places.
- Mina, NV 5.6" · 0.0" off
- Deaver, WY 5.5" · 0.0" off
- Bouse, AZ 5.7" · 0.1" off
- Nuiqsut, AK 5.7" · 0.1" off
Scarce-water calendar
Where Johnson Valley's limited precipitation lands
mixed demand · dry · mid swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 5.6 inches annually, within PlainClimate's dry band. Snowfall is not added to the interpretation because its annual value is missing. The monthly distribution matters because the total alone does not reveal the timing.
July and December mark the typical warm and cold ends of the calendar in Johnson Valley's middle-range seasonal profile. The measured spread is 38.4°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 Johnson Valley's normal, at 2,643 and 2,107 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.
Johnson Valley has a long frost-free window of roughly 273 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
Johnson Valley wettest normal
January
January concentrates the scarce annual total (5.6 inches).
Johnson Valley driest normal
June
June is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Johnson Valley's climate
How dry is Johnson Valley? ▼
How many days above 90°F does Johnson Valley get? ▼
How much energy does heating and cooling require in Johnson Valley? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Johnson Valley's primary station: JOHNSON VALLEY (USC00044394). 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 Johnson 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 Johnson 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.