Los Banos, California climate: Normal weather by month, frost dates and records
Los Banos's normal year runs from 38°F December nights to 95°F July afternoons, with 9.5 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.4°C, December lows of 4°C, July highs of 35°C, 241 mm of precipitation a year.
- NOAA stationLos Banos
- Station IDUSC00045118
- Location37.06°N 120.87°W
- Elevation120 ft (37 m)
- Population48,684
On October 24, the normal high in Los Banos is 76°F and the normal low 51°F, and the chance of measurable rain or snow is 8%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Los Banos.
- Jan 56° 39°
- Feb 62° 43°
- Mar 68° 46°
- Apr 73° 49°
- May 81° 55°
- Jun 89° 60°
- Jul 95° 64°
- Aug 94° 63°
- Sep 90° 60°
- Oct 79° 53°
- Nov 66° 44°
- Dec 56° 38°
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 Los Banos each month?
July is the warmest month, with normal highs of 95°F; December the coldest, with normal lows of 38°F. The most precipitation falls in January (2.07 in), the least in August (0.01 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 56°F | 39°F | 47.5°F | 2.07 | 9 | <1 | 6 | 9 h 50 min |
| February | 62°F | 43°F | 52.1°F | 1.83 | 8 | <1 | 1 | 10 h 50 min |
| March | 68°F | 46°F | 56.9°F | 1.34 | 7 | <1 | <1 | 11 h 50 min |
| April | 73°F | 49°F | 61.3°F | 0.65 | 4 | 1 | <1 | 13 h 10 min |
| May | 81°F | 55°F | 68.2°F | 0.46 | 2 | 7 | <1 | 14 h 10 min |
| June | 89°F | 60°F | 74.6°F | 0.08 | 1 | 16 | <1 | 14 h 40 min |
| July | 95°F | 64°F | 79.2°F | 0.02 | <1 | 27 | <1 | 14 h 30 min |
| August | 94°F | 63°F | 78.3°F | 0.01 | <1 | 25 | <1 | 13 h 40 min |
| September | 90°F | 60°F | 74.9°F | 0.05 | <1 | 18 | <1 | 12 h 30 min |
| October | 79°F | 53°F | 66.0°F | 0.46 | 2 | 4 | <1 | 11 h 20 min |
| November | 66°F | 44°F | 54.9°F | 0.85 | 5 | <1 | 1 | 10 h 10 min |
| December | 56°F | 38°F | 47.1°F | 1.66 | 8 | <1 | 7 | 9 h 40 min |
| Year (annual) | 76°F | 51°F | 63.4°F | 9.48 | 47 | 97 | 16 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 4°C | 8.6°C | 53 mm |
| February | 17°C | 6°C | 11.2°C | 46 mm |
| March | 20°C | 8°C | 13.8°C | 34 mm |
| April | 23°C | 10°C | 16.3°C | 17 mm |
| May | 27°C | 13°C | 20.1°C | 12 mm |
| June | 32°C | 16°C | 23.7°C | 2 mm |
| July | 35°C | 18°C | 26.2°C | 1 mm |
| August | 34°C | 17°C | 25.7°C | 0 mm |
| September | 32°C | 16°C | 23.8°C | 1 mm |
| October | 26°C | 12°C | 18.9°C | 12 mm |
| November | 19°C | 7°C | 12.7°C | 22 mm |
| December | 13°C | 4°C | 8.4°C | 42 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00045118; 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 Los Banos?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October has the fewest days with rain (2).
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 USC00045118.
When is the last frost in Los Banos?
In Los Banos, the last spring frost (32°F) comes after January 26 in half of years and after February 20 in one year in ten; the first autumn frost comes before December 10 in half of years and before November 26 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
- January 261 year in 10 after February 20; 9 in 10 after December 29
- First autumn frost, half of years before
- December 101 year in 10 before November 26; 9 in 10 before January 4
NOAA puts the median frost-free season at 322 days, and the season without a hard freeze (28°F) at 356 days.
A hard freeze (28°F) comes after January 6 in half of springs and before December 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Los Banos in zone 9a in ZIP code 93635, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Los Banos's NOAA station is in zone 9b: the coldest night of a typical year reaches 27°F (25 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 USC00045118; 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 Los Banos?
In a normal year in Los Banos, 97 days a year reach 90°F (20 of them 100°F or more), 16 nights fall to 32°F or colder and 47 days bring measurable precipitation.
- Days at 90°F or more
- 97a normal year
- Days at 100°F or more
- 20a normal year
- Nights at 32°F or colder
- 16a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 47a normal year
The highest temperature in this station's record (since 1929) is 114°F, on June 30, 1950; the lowest is 14°F, on January 11, 1949.
The wettest calendar year on that record is 1998, with 21.08 in; the snowiest season is 1961–62, with 1.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00045118; records: ACIS (NOAA Regional Climate Centers), station USC00045118. Records use complete months only; a month missing more than three days is left out.
How sunny is Los Banos?
Over a year 90% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Los Banos, 5.3 kWh per square metre a day. July is the sunniest month (98%) and January the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.3 |
| February | 78% | 3.5 |
| March | 82% | 4.9 |
| April | 86% | 6.3 |
| May | 92% | 7.6 |
| June | 96% | 8.4 |
| July | 98% | 8.2 |
| August | 98% | 7.4 |
| September | 96% | 6.0 |
| October | 92% | 4.4 |
| November | 82% | 2.9 |
| December | 72% | 2.1 |
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 Los Banos need?
A normal year in Los Banos brings 2,276 heating degree days, 58% fewer than the median U.S. place (5,373), and 1,719 cooling degree days, 89% more than the median (908). Four months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,205 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 544 | 0 |
| February | 361 | 0 |
| March | 255 | 4 |
| April | 144 | 35 |
| May | 41 | 141 |
| June | 4 | 294 |
| July | 0 | 440 |
| August | 0 | 414 |
| September | 4 | 299 |
| October | 61 | 91 |
| November | 306 | 3 |
| December | 555 | 0 |
| Year (annual) | 2,276 | 1,719 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00045118. 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 Los Banos been warmer than normal lately?
2025 averaged 64.0°F, 0.6°F above the 1991-2020 normal of 63.4°F. 2 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 62.7°F | −0.7°F | 13.67 |
| 2024 | 65.2°F | +1.8°F | 10.38 |
| 2025 | 64.0°F | +0.6°F | 8.70 |
Over 66 complete years from 1935 to 2025, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.21°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00045118; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Los Banos's climate compare?
Los Banos is warmer than 158 of the other 218 places with their own NOAA record in California, and wetter than 40. Across the 7,247 U.S. stations with normals, its annual mean of 63.4°F is warmer than 84%.
In the Köppen classification computed from these normals, Los Banos is BSk: cold semi-arid steppe. 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 Los Banos share this climate record?
4 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.
- Dos Palos, CA5,759 people · 14 mi E
- South Dos Palos, CA1,637 people · 13 mi SE
- Dos Palos Y, CA230 people · 13 mi E
- Volta, CA188 people · 3 mi NW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Los Banos's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Los Banos. This page uses Los Banos; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Los Banos Det Resv USC00045120 | 6 mi SW | 407 ft | 64.1°F | 41°F | 95°F | 8.0 | 0 | January 13 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Los Banos's climate
What is the coldest month in Los Banos?
December, with a normal high of 56°F and a normal low of 38°F. The warmest is July (95°F by day, 64°F at night).
Does it snow in Los Banos?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Los Banos?
January, with 2.07 in of precipitation in a normal year; the driest is August with 0.01 in.
What plant hardiness zone is Los Banos in?
The USDA's 2023 map puts Los Banos in zone 9a in ZIP code 93635, the nearest ZIP area. By the same method at Los Banos's NOAA station, the coldest night of a typical year reaches 27°F (25 years, 1991-2020): zone 9b.
How late can frost come in Los Banos?
In half of years the last 32°F night comes after January 26; in one year in ten it comes after February 20. Waiting until February 20 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Los Banos in OctoberThis month day by day, its records and recent years
- California climateThe statewide normals and every place in the state
- San Luis Dam, CA11 miles from this station, 63.5°F a year
- Newman, CA17 miles from this station, 65.0°F a year
- Merced, CA25 miles from this station, 62.3°F a year
- Turlock, CA31 miles from this station, 64.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made