Glenbrook, Nevada climate: Normal weather by month, frost dates and records
Glenbrook's normal year runs from 25°F January nights to 76°F August afternoons, with 18.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −4°C, August highs of 25°C, 469 mm of precipitation a year.
- NOAA stationGlenbrook
- Station IDUSC00263205
- Location39.08°N 119.94°W
- Elevation6,350 ft (1,936 m)
- From the center2 miles
- Population (census place)274
On October 23, the normal high in Glenbrook is 57°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 Glenbrook.
- Jan 41° 25°
- Feb 41° 25°
- Mar 46° 28°
- Apr 51° 30°
- May 59° 37°
- Jun 69° 42°
- Jul 77° 50°
- Aug 76° 50°
- Sep 71° 45°
- Oct 60° 38°
- Nov 48° 30°
- Dec 40° 25°
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 Glenbrook each month?
August is the warmest month, with normal highs of 76°F; January the coldest, with normal lows of 25°F. The most precipitation falls in January (3.18 in), the least in August (0.22 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 41°F | 25°F | 32.7°F | 3.18 | 8 | <1 | 27 | 9 h 40 min |
| February | 41°F | 25°F | 33.1°F | 2.71 | 7 | <1 | 24 | 10 h 40 min |
| March | 46°F | 28°F | 37.1°F | 2.62 | 6 | <1 | 25 | 11 h 50 min |
| April | 51°F | 30°F | 40.6°F | 1.25 | 4 | <1 | 19 | 13 h 10 min |
| May | 59°F | 37°F | 48.1°F | 1.34 | 5 | <1 | 8 | 14 h 20 min |
| June | 69°F | 42°F | 55.5°F | 0.58 | 2 | <1 | 1 | 14 h 50 min |
| July | 77°F | 50°F | 63.1°F | 0.32 | 1 | <1 | <1 | 14 h 40 min |
| August | 76°F | 50°F | 63.2°F | 0.22 | 1 | <1 | <1 | 13 h 40 min |
| September | 71°F | 45°F | 58.2°F | 0.28 | 2 | <1 | 1 | 12 h 30 min |
| October | 60°F | 38°F | 48.6°F | 1.00 | 3 | <1 | 6 | 11 h 10 min |
| November | 48°F | 30°F | 39.3°F | 1.91 | 5 | <1 | 18 | 10 h |
| December | 40°F | 25°F | 32.7°F | 3.05 | 7 | <1 | 26 | 9 h 30 min |
| Year (annual) | 57°F | 35°F | 46.0°F | 18.46 | 51 | <1 | 153 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 5°C | −4°C | 0.4°C | 81 mm |
| February | 5°C | −4°C | 0.6°C | 69 mm |
| March | 8°C | −2°C | 2.8°C | 67 mm |
| April | 11°C | −1°C | 4.8°C | 32 mm |
| May | 15°C | 3°C | 8.9°C | 34 mm |
| June | 21°C | 5°C | 13.1°C | 15 mm |
| July | 25°C | 10°C | 17.3°C | 8 mm |
| August | 25°C | 10°C | 17.3°C | 6 mm |
| September | 22°C | 7°C | 14.6°C | 7 mm |
| October | 15°C | 3°C | 9.2°C | 25 mm |
| November | 9°C | −1°C | 4.1°C | 49 mm |
| December | 5°C | −4°C | 0.4°C | 77 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Carson (10 miles away), gets 14 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00263205; 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 Glenbrook?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, July 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 USC00263205.
When is the last frost in Glenbrook?
In Glenbrook, the last spring frost (32°F) comes after June 5 in half of years and after June 22 in one year in ten; the first autumn frost comes before October 9 in half of years and before September 24 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
- June 51 year in 10 after June 22; 9 in 10 after May 12
- First autumn frost, half of years before
- October 91 year in 10 before September 24; 9 in 10 before October 28
NOAA puts the median frost-free season at 126 days, and the season without a hard freeze (28°F) at 160 days.
A hard freeze (28°F) comes after May 12 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Glenbrook in zone 7a in ZIP code 89413. By the map's own method, the average of each year's coldest night over 1991-2020, Glenbrook's NOAA station is in zone 8a: the coldest night of a typical year reaches 10°F (16 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 Nevada · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00263205; 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 Glenbrook?
In a normal year in Glenbrook, a 90°F day is rare, 153 nights fall to 32°F or colder and 51 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 153a normal year
- Days that stay below freezing
- 11high of 32°F or less
- Days with 0.01 inch of precipitation
- 51a normal year
The highest temperature in this station's record (since 1909) is 96°F, on July 17, 1960; the lowest is −10°F, on February 15, 1911.
The wettest calendar year on that record is 1967, with 31.07 in; the snowiest season is 1951–52, with 299.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00263205; records: ACIS (NOAA Regional Climate Centers), station USC00263205. Records use complete months only; a month missing more than three days is left out.
How sunny is Glenbrook?
Over a year 86% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Glenbrook, 5.2 kWh per square metre a day. August is the sunniest month (94%) and December the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.4 |
| February | 76% | 3.4 |
| March | 79% | 4.8 |
| April | 83% | 6.3 |
| May | 85% | 7.3 |
| June | 92% | 8.3 |
| July | 93% | 8.0 |
| August | 94% | 7.3 |
| September | 93% | 5.9 |
| October | 89% | 4.3 |
| November | 81% | 2.8 |
| December | 71% | 2.0 |
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 Glenbrook need?
A normal year in Glenbrook brings 6,969 heating degree days, 30% more than the median U.S. place (5,373), and 66 cooling degree days, 93% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,399 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,001 | 0 |
| February | 892 | 0 |
| March | 867 | 0 |
| April | 730 | 0 |
| May | 524 | 0 |
| June | 291 | 5 |
| July | 91 | 31 |
| August | 82 | 26 |
| September | 208 | 4 |
| October | 507 | 0 |
| November | 773 | 0 |
| December | 1,003 | 0 |
| Year (annual) | 6,969 | 66 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00263205. 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.
Has Glenbrook been warmer than normal lately?
Over 35 complete years from 1946 to 2015, the station's annual mean temperature rose at a fitted 2.5°F per century (+0.14°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Glenbrook's climate compare?
Glenbrook is warmer than 4 of the other 54 places with their own NOAA record in Nevada, and wetter than 49. Across the 7,247 U.S. stations with normals, its annual mean of 46.0°F is warmer than 23%.
In the Köppen classification computed from these normals, Glenbrook 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 Glenbrook share this climate record?
Logan Creek has no NOAA station with 1991-2020 normals of its 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.
- Logan Creek, NV45 people · 1 mi SE
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 Glenbrook's climate
What is the coldest month in Glenbrook?
January, with a normal high of 41°F and a normal low of 25°F. The warmest is August (76°F by day, 50°F at night).
Does it snow in Glenbrook?
Yes. NOAA publishes no 1991-2020 snowfall normal for Glenbrook's NOAA station; the nearest record that keeps one, Carson (10 miles away), records 14 inches of snow in a normal year.
What is the rainiest month in Glenbrook?
January, with 3.18 in of precipitation in a normal year; the driest is August with 0.22 in.
What plant hardiness zone is Glenbrook in?
The USDA's 2023 map puts Glenbrook in zone 7a in ZIP code 89413. By the same method at Glenbrook's NOAA station, the coldest night of a typical year reaches 10°F (16 years, 1991-2020): zone 8a.
How late can frost come in Glenbrook?
In half of years the last 32°F night comes after June 5; in one year in ten it comes after June 22. Waiting until June 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Nevada climateThe statewide normals and every place in the state
- Dagget Pass, NV7 miles from this station, 43.3°F a year
- Carson, NV10 miles from this station, 51.7°F a year
- Tahoma, CA10 miles from this station, 43.3°F a year
- Incline Village, NV12 miles from this station, 46.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made