Trona, California climate: Normal weather by month, frost dates and records
Trona's normal year runs from 34°F December nights to 107°F July afternoons, with 3.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 20.2°C, December lows of 1°C, July highs of 42°C, 92 mm of precipitation a year.
- NOAA stationTrona
- Station IDUSC00049035
- Location35.76°N 117.39°W
- Elevation1,695 ft (517 m)
- Population (census place)0
On October 23, the normal high in Trona is 82°F and the normal low 52°F, and the chance of measurable rain or snow is 3%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Trona.
- Jan 60° 35°
- Feb 66° 39°
- Mar 73° 45°
- Apr 81° 51°
- May 90° 59°
- Jun 100° 68°
- Jul 107° 74°
- Aug 106° 74°
- Sep 99° 67°
- Oct 86° 55°
- Nov 71° 42°
- Dec 60° 34°
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 Trona each month?
July is the warmest month, with normal highs of 107°F; December the coldest, with normal lows of 34°F. The most precipitation falls in February (0.91 in), the least in June (0.02 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 35°F | 47.4°F | 0.77 | 3 | <1 | 9 | 10 h |
| February | 66°F | 39°F | 52.6°F | 0.91 | 3 | <1 | 4 | 10 h 50 min |
| March | 73°F | 45°F | 59.2°F | 0.48 | 2 | <1 | 1 | 11 h 50 min |
| April | 81°F | 51°F | 65.8°F | 0.11 | 1 | 4 | <1 | 13 h |
| May | 90°F | 59°F | 74.7°F | 0.07 | 1 | 14 | <1 | 14 h |
| June | 100°F | 68°F | 84.1°F | 0.02 | <1 | 25 | <1 | 14 h 30 min |
| July | 107°F | 74°F | 90.5°F | 0.09 | 1 | 31 | <1 | 14 h 20 min |
| August | 106°F | 74°F | 89.8°F | 0.06 | 1 | 30 | <1 | 13 h 30 min |
| September | 99°F | 67°F | 82.9°F | 0.09 | 1 | 25 | <1 | 12 h 30 min |
| October | 86°F | 55°F | 70.0°F | 0.20 | 1 | 8 | <1 | 11 h 20 min |
| November | 71°F | 42°F | 56.5°F | 0.24 | 1 | <1 | 2 | 10 h 20 min |
| December | 60°F | 34°F | 47.0°F | 0.58 | 2 | <1 | 10 | 9 h 50 min |
| Year (annual) | 83°F | 54°F | 68.4°F | 3.62 | 16 | 137 | 26 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 16°C | 2°C | 8.6°C | 20 mm |
| February | 19°C | 4°C | 11.4°C | 23 mm |
| March | 23°C | 7°C | 15.1°C | 12 mm |
| April | 27°C | 10°C | 18.8°C | 3 mm |
| May | 32°C | 15°C | 23.7°C | 2 mm |
| June | 38°C | 20°C | 28.9°C | 1 mm |
| July | 42°C | 23°C | 32.5°C | 2 mm |
| August | 41°C | 23°C | 32.1°C | 2 mm |
| September | 37°C | 19°C | 28.3°C | 2 mm |
| October | 30°C | 13°C | 21.1°C | 5 mm |
| November | 22°C | 6°C | 13.6°C | 6 mm |
| December | 15°C | 1°C | 8.3°C | 15 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00049035; 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 Trona?
Normal highs sit between 65°F and 85°F in February, March, April and November. Of those, April 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 USC00049035.
When is the last frost in Trona?
In Trona, the last spring frost (32°F) comes after February 15 in half of years and after March 4 in one year in ten; the first autumn frost comes before November 28 in half of years and before November 11 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
- February 151 year in 10 after March 4; 9 in 10 after January 21
- First autumn frost, half of years before
- November 281 year in 10 before November 11; 9 in 10 before December 16
NOAA puts the median frost-free season at 285 days, and the season without a hard freeze (28°F) at 321 days.
A hard freeze (28°F) comes after January 23 in half of springs and before December 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Trona in zone 9a in ZIP code 93562, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Trona's NOAA station is in zone 9b: the coldest night of a typical year reaches 25°F (17 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 USC00049035; 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 Trona?
In a normal year in Trona, 137 days a year reach 90°F (78 of them 100°F or more), 26 nights fall to 32°F or colder and 16 days bring measurable precipitation.
- Days at 90°F or more
- 137a normal year
- Days at 100°F or more
- 78a normal year
- Nights at 32°F or colder
- 26a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 16a normal year
The highest temperature in this station's record (since 1920) is 119°F, on July 11, 2021; the lowest is 8°F, on December 23, 1990.
The wettest calendar year on that record is 2023, with 9.70 in; the snowiest season is 1973–74, with 9.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00049035; records: ACIS (NOAA Regional Climate Centers), station USC00049035. Records use complete months only; a month missing more than three days is left out.
How sunny is Trona?
Over a year 93% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Trona, 5.8 kWh per square metre a day. June is the sunniest month (97%) and December the cloudiest (85%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 86% | 3.1 |
| February | 87% | 4.2 |
| March | 90% | 5.7 |
| April | 93% | 7.0 |
| May | 94% | 8.0 |
| June | 97% | 8.6 |
| July | 95% | 8.0 |
| August | 97% | 7.5 |
| September | 97% | 6.3 |
| October | 94% | 4.8 |
| November | 91% | 3.5 |
| December | 85% | 2.8 |
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 Trona need?
A normal year in Trona brings 2,053 heating degree days, 62% fewer than the median U.S. place (5,373), and 3,311 cooling degree days, 3.6 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 7,073 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 546 | 0 |
| February | 352 | 3 |
| March | 202 | 22 |
| April | 81 | 103 |
| May | 16 | 317 |
| June | 1 | 574 |
| July | 0 | 791 |
| August | 0 | 767 |
| September | 0 | 536 |
| October | 31 | 187 |
| November | 266 | 11 |
| December | 558 | 0 |
| Year (annual) | 2,053 | 3,311 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00049035. 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 Trona been warmer than normal lately?
2025 averaged 70.1°F, 1.7°F above the 1991-2020 normal of 68.4°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 69.4°F | +1.0°F | 2.54 |
| 2022 | 68.2°F | −0.2°F | 2.04 |
| 2023 | 67.4°F | −1.0°F | 9.70 |
| 2024 | 70.2°F | +1.8°F | 4.42 |
| 2025 | 70.1°F | +1.7°F | 8.38 |
Over 71 complete years from 1922 to 2025, the station's annual mean temperature rose at a fitted 3.5°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00049035; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Trona's climate compare?
Trona is warmer than 208 of the other 218 places with their own NOAA record in California, and wetter than 6. Across the 7,247 U.S. stations with normals, its annual mean of 68.4°F is warmer than 94%.
In the Köppen classification computed from these normals, Trona is BWh: hot desert. 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 Trona share this climate record?
3 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.
- Searles Valley, CA1,698 people · 1 mi NW
- Homewood Canyon, CA195 people · 9 mi N
- Valley Wells, CA0 people · 9 mi N
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 Trona's climate
What is the coldest month in Trona?
December, with a normal high of 60°F and a normal low of 34°F. The warmest is July (107°F by day, 74°F at night).
Does it snow in Trona?
Rarely: NOAA's normal is no measurable snow a year.
What is the rainiest month in Trona?
February, with 0.91 in of precipitation in a normal year; the driest is June with 0.02 in.
What plant hardiness zone is Trona in?
The USDA's 2023 map puts Trona in zone 9a in ZIP code 93562, the nearest ZIP area. By the same method at Trona's NOAA station, the coldest night of a typical year reaches 25°F (17 years, 1991-2020): zone 9b.
How late can frost come in Trona?
In half of years the last 32°F night comes after February 15; in one year in ten it comes after March 4. Waiting until March 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- California climateThe statewide normals and every place in the state
- China Lake Naf, CA18 miles from this station, 65.3°F a year
- Inyokern, CA25 miles from this station, 64.8°F a year
- Randsburg, CA31 miles from this station, 64.2°F a year
- Haiwee, CA41 miles from this station, 57.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made