Glennville, California climate: Normal weather by month, frost dates and records
Glennville's normal year runs from 27°F December nights to 89°F July afternoons, with 19.4 inches of precipitation and 6 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.3°C, December lows of −3°C, July highs of 32°C, 493 mm of precipitation a year.
- NOAA stationGlennville
- Station IDUSC00043463
- Location35.73°N 118.70°W
- Elevation3,140 ft (957 m)
- From the centerunder 1 mile
- Population (census place)33
On October 23, the normal high in Glennville is 71°F and the normal low 36°F, and the chance of measurable rain or snow is 11%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Glennville.
- Jan 57° 28°
- Feb 57° 30°
- Mar 60° 33°
- Apr 64° 35°
- May 72° 41°
- Jun 82° 46°
- Jul 89° 52°
- Aug 89° 50°
- Sep 84° 45°
- Oct 73° 38°
- Nov 62° 32°
- Dec 55° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Glennville each month?
July is the warmest month, with normal highs of 89°F; December the coldest, with normal lows of 27°F. The most precipitation falls in January (3.65 in), the least in July (0.08 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 57°F | 28°F | 42.4°F | 3.65 | 1.3 | 9 | <1 | 22 | 10 h |
| February | 57°F | 30°F | 43.2°F | 3.53 | 1.6 | 9 | <1 | 18 | 10 h 50 min |
| March | 60°F | 33°F | 46.1°F | 3.09 | 1.6 | 8 | <1 | 15 | 11 h 50 min |
| April | 64°F | 35°F | 49.5°F | 1.73 | 0.4 | 6 | <1 | 8 | 13 h |
| May | 72°F | 41°F | 56.4°F | 0.83 | 0.0 | 4 | 1 | 2 | 14 h |
| June | 82°F | 46°F | 63.8°F | 0.19 | 0.0 | 1 | 7 | <1 | 14 h 30 min |
| July | 89°F | 52°F | 70.7°F | 0.08 | 0.0 | 1 | 16 | <1 | 14 h 20 min |
| August | 89°F | 50°F | 69.8°F | 0.08 | 0.0 | 1 | 17 | <1 | 13 h 30 min |
| September | 84°F | 45°F | 64.7°F | 0.13 | 0.0 | 1 | 8 | <1 | 12 h 30 min |
| October | 73°F | 38°F | 55.5°F | 0.86 | 0.0 | 3 | 1 | 5 | 11 h 20 min |
| November | 62°F | 32°F | 47.0°F | 1.94 | 0.1 | 6 | <1 | 15 | 10 h 20 min |
| December | 55°F | 27°F | 41.4°F | 3.30 | 1.2 | 8 | <1 | 23 | 9 h 50 min |
| Year (annual) | 70°F | 38°F | 54.2°F | 19.41 | 6.2 | 55 | 50 | 108 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 14°C | −2°C | 5.8°C | 93 mm | 3 cm |
| February | 14°C | −1°C | 6.2°C | 90 mm | 4 cm |
| March | 15°C | 0°C | 7.8°C | 78 mm | 4 cm |
| April | 18°C | 2°C | 9.7°C | 44 mm | 1 cm |
| May | 22°C | 5°C | 13.6°C | 21 mm | 0 cm |
| June | 28°C | 8°C | 17.7°C | 5 mm | 0 cm |
| July | 32°C | 11°C | 21.5°C | 2 mm | 0 cm |
| August | 32°C | 10°C | 21.0°C | 2 mm | 0 cm |
| September | 29°C | 7°C | 18.2°C | 3 mm | 0 cm |
| October | 23°C | 3°C | 13.1°C | 22 mm | 0 cm |
| November | 17°C | 0°C | 8.3°C | 49 mm | 0 cm |
| December | 13°C | −3°C | 5.2°C | 84 mm | 3 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043463; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Glennville?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, June has the fewest days with rain (1).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043463.
When is the last frost in Glennville?
In Glennville, the last spring frost (32°F) comes after May 11 in half of years and after June 6 in one year in ten; the first autumn frost comes before October 17 in half of years and before September 30 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 111 year in 10 after June 6; 9 in 10 after April 21
- First autumn frost, half of years before
- October 171 year in 10 before September 30; 9 in 10 before November 4
NOAA puts the median frost-free season at 155 days, and the season without a hard freeze (28°F) at 194 days.
A hard freeze (28°F) comes after April 19 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Glennville in zone 8b in ZIP code 93226, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Glennville's NOAA station is in zone 8a: the coldest night of a typical year reaches 15°F (18 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in California · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00043463; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Glennville?
In a normal year in Glennville, 50 days a year reach 90°F (2 of them 100°F or more), 108 nights fall to 32°F or colder and 55 days bring measurable precipitation.
- Days at 90°F or more
- 50a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 108a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 55a normal year
- Days with 1 inch of snow or more
- 2a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00043463.
How sunny is Glennville?
Over a year 90% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Glennville, 5.6 kWh per square metre a day. August is the sunniest month (97%) and January the cloudiest (78%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.9 |
| February | 79% | 3.8 |
| March | 83% | 5.2 |
| April | 86% | 6.6 |
| May | 91% | 7.7 |
| June | 97% | 8.5 |
| July | 96% | 8.1 |
| August | 97% | 7.5 |
| September | 96% | 6.3 |
| October | 91% | 4.7 |
| November | 86% | 3.4 |
| December | 78% | 2.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Glennville need?
A normal year in Glennville brings 4,399 heating degree days, 18% fewer than the median U.S. place (5,373), and 485 cooling degree days, 47% fewer than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,702 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 699 | 0 |
| February | 612 | 0 |
| March | 586 | 0 |
| April | 465 | 0 |
| May | 275 | 10 |
| June | 95 | 61 |
| July | 8 | 185 |
| August | 10 | 159 |
| September | 75 | 64 |
| October | 299 | 6 |
| November | 542 | 0 |
| December | 733 | 0 |
| Year (annual) | 4,399 | 485 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00043463. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Glennville's climate compare?
Glennville is warmer than 38 of the other 218 places with their own NOAA record in California, and wetter than 132. Across the 7,247 U.S. stations with normals, its annual mean of 54.2°F is warmer than 58%.
In the Köppen classification computed from these normals, Glennville is Csb: temperate, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Glennville share this climate record?
10 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Pine Flat, CA205 people · 11 mi N
- Woody, CA110 people · 7 mi W
- Idlewild, CA57 people · 6 mi N
- Panorama Heights, CA40 people · 7 mi NE
- California Hot Springs, CA20 people · 11 mi N
- McClenney Tract, CA4 people · 7 mi NE
- Posey, CA0 people · 6 mi N
- Poso Park, CA0 people · 7 mi NE
- Sugarloaf Saw Mill, CA0 people · 9 mi NE
- Sugarloaf Village, CA0 people · 8 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Glennville's climate
What is the coldest month in Glennville?
December, with a normal high of 55°F and a normal low of 27°F. The warmest is July (89°F by day, 52°F at night).
Does it snow in Glennville?
Yes: 6 inches in a normal year, falling on 4 days with 0.1 inch or more, the most in February (1.6 inches).
What is the rainiest month in Glennville?
January, with 3.65 in of precipitation in a normal year; the driest is July with 0.08 in.
What plant hardiness zone is Glennville in?
The USDA's 2023 map puts Glennville in zone 8b in ZIP code 93226, the nearest ZIP area. By the same method at Glennville's NOAA station, the coldest night of a typical year reaches 15°F (18 years, 1991-2020): zone 8a.
How late can frost come in Glennville?
In half of years the last 32°F night comes after May 11; in one year in ten it comes after June 6. Waiting until June 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- Kern River Powerhouse 3, CA15 miles from this station, 61.3°F a year
- South Lake FS, CA20 miles from this station, 61.2°F a year
- Bakersfield, CA29 miles from this station, 66.2°F a year
- Loraine (5 mi NNE), CA29 miles from this station, 56.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made