Glennville, CA Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Glennville's primary NOAA station, GLENNVILLE.
The climate verdict for Glennville
Dryness leads the climate profile for Glennville, California, with 19.4 inches of precipitation a year. NOAA records an annual average of 54°F. At 54/100 (moderate) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 31% of scores.
- 54°F
- annual average temperature (NOAA normal)
- 54/100
- comfort score, above 31% of station-mapped location scores
- 19.4"
- annual precipitation · 6" snow
- 159 days
- frost-free growing season
Glennville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00043463 · Glennville, CA 54°F mean · 19.4" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 54°F
- RANK-MID #3,979
- PHOTO-FINISH ≈ Caesars Head
- PRCP-DRY 19.4"
- SWING-NARROW 29°F
- COMF-LOW 54/100
- LOAD-HEAT 4,399 HDD
- STN-1 USC00043463
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Caesars Head, SC (+ 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.
- Glennville (this station) 54°F
- Cold Vancouver Pears…, WA 54°F
- Hot Lake Toxaway, NC 54°F
- Near Caesars Head, SC 54°F
- Near Germany Valley, GA 54°F
Climate Living Index · Glennville
Glennville: 53/100 · grade D
Glennville publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Glennville, not an official NOAA rating. Rankings still use Comfort Score 54/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 6.2 inches/year | 69/100 · C |
| Annual temperature balance | 54.2°F · 13.3° from 67.5°F | 57/100 · C |
| Normal heat + freeze calendar | 134 calendar days | 56/100 · C |
| Precipitation balance | 19.4 in · 15.6 from 35 in | 45/100 · D |
| Frost-free season | 159 days/year | 33/100 · F |
Glennville · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Glennville is a temperate Köppen climate: Csb
Coldest-month mean 41.4°F and warmest-month mean 70.7°F place this station in temperate, dry-summer, warm summer climates (Csb). Class Csb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, warm summer.
- Köppen code
- Csb
- Group
- Temperate
- Warmest month
- 70.7°F
- Coldest month
- 41.4°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 Glennville sits across the climate record
Three NOAA fields for Glennville's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 58th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Drier than 73%
- Glennville's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 91%
- Warmest-to-coldest month gap for Glennville is compact versus 6,861 complete station-years.
How Glennville compares across U.S. station-mapped locations
Glennville's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 31st percentile score exceeds 31% 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 57°F (14°C) | 28°F (-2°C) | 42°F (6°C) | 3.6" | 1.3" | 21.9 | 0.0 |
| February | 57°F (14°C) | 30°F (-1°C) | 43°F (6°C) | 3.5" | 1.6" | 17.5 | 0.0 |
| March | 60°F (15°C) | 33°F (0°C) | 46°F (8°C) | 3.1" | 1.6" | 14.8 | 0.0 |
| April | 64°F (18°C) | 35°F (2°C) | 50°F (10°C) | 1.7" | 0.4" | 8.3 | 0.0 |
| May | 72°F (22°C) | 41°F (5°C) | 56°F (14°C) | 0.8" | 0.0" | 1.8 | 0.9 |
| June | 82°F (28°C) | 46°F (8°C) | 64°F (18°C) | 0.2" | 0.0" | 0.3 | 7.2 |
| July | 89°F (32°C) | 52°F (11°C) | 71°F (22°C) | 0.1" | 0.0" | 0.0 | 16.3 |
| August | 89°F (32°C) | 50°F (10°C) | 70°F (21°C) | 0.1" | 0.0" | 0.0 | 16.6 |
| September | 84°F (29°C) | 45°F (7°C) | 65°F (18°C) | 0.1" | 0.0" | 0.4 | 8.3 |
| October | 73°F (23°C) | 38°F (3°C) | 56°F (13°C) | 0.9" | 0.0" | 4.7 | 0.6 |
| November | 62°F (17°C) | 32°F (0°C) | 47°F (8°C) | 1.9" | 0.1" | 15.2 | 0.0 |
| December | 55°F (13°C) | 27°F (-3°C) | 41°F (5°C) | 3.3" | 1.2" | 23.3 | 0.0 |
The year, day by day
Glennville works both ends of the calendar. Normal highs climb to 90°F by July 22 and hold at or above 90°F on 18 dates, then normal lows drop to freezing or below on 116 dates, bottoming at 27°F around December 16.
When the heat sits
Normal highs reach 90°F from July 19 through August 5, covering 18 dates. The broader mild season, normal highs of 70°F or more, runs May 9 to October 25.
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.
The freezing stretch
The normal low stays at or below 32°F into March 8, then returns to freezing around November 14, covering 116 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 February 18, when 32% of years recorded at least a hundredth of an inch. The driest is July 2 at 2%. Summed across the calendar, that is about 55 wet dates a year.
The widest day
August 30 carries the biggest normal gap between afternoon and dawn, 40°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Glennville.
Where Glennville Stands Nationally
Day-to-night contrast is extreme by national standards — the widest normal daily swing reaches about 40°F, sharper than nine in ten ranked stations see.
Glennville 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
Snow: 1.3"
8.9 days with precipitation
Snow: 1.6"
9.1 days with precipitation
Snow: 1.6"
7.7 days with precipitation
Snow: 0.4"
6.0 days with precipitation
3.6 days with precipitation
0.8 days with precipitation
0.7 days with precipitation
0.5 days with precipitation
0.8 days with precipitation
2.9 days with precipitation
Snow: 0.1"
5.8 days with precipitation
Snow: 1.2"
8.0 days with precipitation
Glennville's wet season runs through the cold months
December, January and February carry 54% of the year's precipitation here, while June through August contribute 2%. 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 29.3°F seasonal spread.
- Wettest month
- January, 3.6"
- Driest month
- August, 0.1"
- Wettest three months
- January, February, December (54% 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 Glennville, it arrives in quantity
19.4" of precipitation falls across only about 55 wet days here, averaging 0.35 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 55 a year, 15% of all days
- Average depth per wet day
- 0.35 inches
- Most wet days
- February, about 9
- Fewest wet days
- August, about 1
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 Glennville, but rarely amounts to much
The normals record 6.2 inches of snow a year here, most likely in February. 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; about 4 days a year record any measurable snow at all.
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
October 17
50% probability date
Last Spring Freeze
May 11
50% probability date
Growing Season
159 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,399
Higher = more heating needed
Cooling Degree Days
485
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Glennville 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 (54°F here).
- Atchison, KS 54°F · 0.0°F off
- Boston, VA 54°F · 0.0°F off
- Kim, CO 54°F · 0.0°F off
- Meadows of Dan, VA 54°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (19.4" here), excluding temperature-peer places.
- Timber Lake, SD 19.4" · 0.0" off
- Gail, TX 19.4" · 0.0" off
- Crystal City, TX 19.5" · 0.1" off
- Zortman, MT 19.5" · 0.1" off
Data-derived climate profile
How Glennville's climate pattern fits together
heating led · dry · low swing
Heating is the larger measured load in Glennville, at 4,399 degree days versus 485 for cooling. Unlike a strongly continental record, however, its 29.3°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Glennville's frost-free season lasts about 159 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
The calendar stays thermally compact and dry. July and December mark the typical warm and cold ends of the calendar, only 29.3°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 54°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Glennville's cold-season load does not imply a wet climate. Annual precipitation is 19.4 inches, which places the station in PlainClimate's dry range. Annual snowfall totals 6.2 inches. The snowfall and rainfall fields should be read separately rather than inferred from temperature.
These labels group NOAA 1991-2020 normals from Glennville'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 Glennville, not an official NOAA class or a year-ahead forecast.
Questions about Glennville's climate
How much rain does Glennville get? ▼
How many days above 90°F does Glennville get? ▼
How much energy does heating and cooling require in Glennville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Glennville's primary station: GLENNVILLE (USC00043463). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as a census-designated place (GEOID 0630126), not an incorporated municipality. Match rule for Glennville: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Glennville 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.