Pomona/fairplex, CA Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Pomona/fairplex's primary NOAA station, POMONA/FAIRPLEX.
The climate verdict for Pomona/fairplex
Dryness leads the climate profile for Pomona/fairplex, California, with 14.5 inches of precipitation a year. NOAA records an annual average of 65°F. It scores 90/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 91% of them.
- 65°F
- annual average temperature (NOAA normal)
- 90/100
- comfort score, above 91% of station-mapped location scores
- 14.5"
- annual precipitation
- 354 days
- frost-free growing season
Pomona/fairplex: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00047050 · Pomona/fairplex, CA 65°F mean · 14.5" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-DRY · SWING-NARROW · COMF-TOP · LOAD-MIX · STN-1 · BOOK-FULL
- TEMP-MILD 65°F
- RANK-UPPER #6,038
- PHOTO-FINISH ≈ Ballinger
- PRCP-DRY 14.5"
- SWING-NARROW 23°F
- COMF-TOP 90/100
- LOAD-MIX H/C balanced
- STN-1 USC00047050
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Ballinger, TX (+ 0 °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.
- Pomona/fairplex (this station) 65°F
- Hot Decatur, TX 65°F
- Near Ballinger, TX 65°F
- Near Boyce, LA 65°F
- Near Cleburne, TX 65°F
Climate Living Index · Pomona/fairplex
Pomona/fairplex: 80/100 · grade B
Pomona/fairplex publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Pomona/fairplex, not an official NOAA rating. Rankings still use Comfort Score 90/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 354 days/year | 100/100 · A |
| Annual temperature balance | 65.0°F · 2.5° from 67.5°F | 92/100 · A |
| Snowfall burden | 0.0 inches/year | 90/100 · A |
| Normal heat + freeze calendar | 62 calendar days | 88/100 · A |
| Precipitation balance | 14.5 in · 20.5 from 35 in | 26/100 · F |
Pomona/fairplex · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Pomona/fairplex is a temperate Köppen climate: Csa
Coldest-month mean 54.2°F and warmest-month mean 77.5°F place this station in temperate, dry-summer, hot summer climates (Csa). Class Csa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, dry-summer, hot summer.
- Köppen code
- Csa
- Group
- Temperate
- Warmest month
- 77.5°F
- Coldest month
- 54.2°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 · balanced station
Where Pomona/fairplex sits across the climate record
Three NOAA fields for Pomona/fairplex's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 12% warmest
- Among 6,861 stations, Pomona/fairplex sits in the warmer third of annual means.
- Annual precipitation
- Drier than 84%
- Pomona/fairplex's annual total ranks in the drier third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 95%
- Warmest-to-coldest month gap for Pomona/fairplex is compact versus 6,861 complete station-years.
How Pomona/fairplex compares across U.S. station-mapped locations
Pomona/fairplex's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
90 Top 9% score exceeds 91% 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%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
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 | 68°F (20°C) | 43°F (6°C) | 56°F (13°C) | 2.9" | 0.0" | 0.7 | 0.1 |
| February | 67°F (20°C) | 45°F (7°C) | 56°F (13°C) | 4.2" | 0.0" | 0.3 | 0.4 |
| March | 72°F (22°C) | 47°F (8°C) | 60°F (15°C) | 2.1" | 0.0" | 0.1 | 0.9 |
| April | 76°F (24°C) | 50°F (10°C) | 63°F (17°C) | 1.0" | 0.0" | 0.0 | 1.6 |
| May | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.2" | 0.0" | 0.0 | 4.2 |
| June | 84°F (29°C) | 57°F (14°C) | 71°F (22°C) | 0.1" | 0.0" | 0.0 | 6.8 |
| July | 90°F (32°C) | 62°F (17°C) | 76°F (25°C) | 0.0" | 0.0" | 0.0 | 16.8 |
| August | 92°F (34°C) | 63°F (17°C) | 78°F (25°C) | 0.0" | 0.0" | 0.0 | 19.0 |
| September | 89°F (32°C) | 60°F (16°C) | 75°F (24°C) | 0.0" | 0.0" | 0.0 | 15.3 |
| October | 81°F (27°C) | 54°F (12°C) | 67°F (20°C) | 1.0" | 0.0" | 0.0 | 5.2 |
| November | 74°F (23°C) | 47°F (8°C) | 60°F (16°C) | 0.7" | 0.0" | 0.3 | 0.2 |
| December | 67°F (19°C) | 42°F (5°C) | 54°F (12°C) | 2.3" | 0.0" | 1.3 | 0.0 |
The year, day by day
The year in Pomona/fairplex runs from a mild 41°F around December 15 to 93°F at the peak near August 20, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from July 12 through September 11, covering 62 dates. The broader mild season, normal highs of 70°F or more, runs March 7 to November 27.
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.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 41°F around December 15.
Where the wet dates fall
The likeliest wet date is February 16, when 22% of years recorded at least a hundredth of an inch. The driest is August 5 at 1%. Summed across the calendar, that is about 31 wet dates a year.
The widest day
August 20 carries the biggest normal gap between afternoon and dawn, 30°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Pomona/fairplex.
Where Pomona/fairplex Stands Nationally
A drier-than-most normal water year — around 15 inches, below what four out of five ranked stations collect.
Pomona/fairplex 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
5.3 days with precipitation
6.3 days with precipitation
4.1 days with precipitation
2.1 days with precipitation
0.9 days with precipitation
0.4 days with precipitation
0.2 days with precipitation
0.1 days with precipitation
0.3 days with precipitation
2.8 days with precipitation
3.3 days with precipitation
4.9 days with precipitation
Pomona/fairplex's wet season runs through the cold months
December, January and February carry 65% of the year's precipitation here, while June through August contribute 1%. 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 23.3°F seasonal spread.
- Wettest month
- February, 4.2"
- Driest month
- July, 0.0"
- Wettest three months
- February, January, December (65% 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 Pomona/fairplex, it arrives in quantity
14.5" of precipitation falls across only about 31 wet days here, averaging 0.47 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 31 a year, 8% of all days
- Average depth per wet day
- 0.47 inches
- Most wet days
- February, about 6
- Fewest wet days
- August, about 0
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.
Pomona/fairplex's record shows no measurable snowfall
This station measured snowfall across the 1991-2020 period and recorded none: the annual normal is 0.0 inches. That is a measured zero rather than missing data, which is a meaningful distinction here , most stations in the database simply do not report snow at all, and those pages say nothing about it.
A thirty-year normal of zero describes the typical year at this station. It is not a claim that snow has never fallen in the area.
Frost Dates & Growing Season
First Fall Freeze
December 28
50% probability date
Last Spring Freeze
January 8
50% probability date
Growing Season
354 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,457
Higher = more heating needed
Cooling Degree Days
1,495
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
Nationwide similar cities
Other rankable U.S. places outside CA closest to Pomona/fairplex 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 (65°F here).
- Ballinger, TX 65°F · 0.0°F off
- Boyce, LA 65°F · 0.0°F off
- Cleburne, TX 65°F · 0.0°F off
- Decatur, TX 65°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (14.5" here), excluding temperature-peer places.
- Denver, CO 14.5" · 0.0" off
- Circle, MT 14.4" · 0.0" off
- Cliff, NM 14.5" · 0.0" off
- Douglas, WY 14.5" · 0.0" off
Scarce-water calendar
Where Pomona/fairplex's limited precipitation lands
mixed demand · dry · low swing
Local precipitation is sparse in this otherwise mixed profile. The station reports 14.5 inches annually, within PlainClimate's dry band. Recorded annual snowfall is negligible. The monthly distribution matters because the total alone does not reveal the timing.
The calendar stays thermally compact and dry. August and December mark the typical warm and cold ends of the calendar, only 23.3°F apart, while the annual precipitation total remains below PlainClimate's dry threshold. The annual average is 65°F. The monthly rows show whether that limited precipitation is spread through the year or concentrated in a shorter interval.
Pomona/fairplex combines a compact 23.3°F annual temperature range with meaningful demand on both sides of the thermostat: 1,457 heating and 1,495 cooling degree days. The balance matters more here than either annual total in isolation.
Pomona/fairplex has a long frost-free window of roughly 354 days, but the dry annual profile is a separate constraint. Growing-season length says when freezes are unlikely, not whether rainfall is sufficient.
Pomona/fairplex wettest normal
February
February concentrates the scarce annual total (14.5 inches).
Pomona/fairplex driest normal
July
July is typically driest; arid stations are defined by when water is absent, not by a four-season grid.
Questions about Pomona/fairplex's climate
How dry is Pomona/fairplex? ▼
How many days above 90°F does Pomona/fairplex get? ▼
How much energy does heating and cooling require in Pomona/fairplex? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Pomona/fairplex's primary station: POMONA/FAIRPLEX (USC00047050). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Pomona/fairplex; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Pomona/fairplex 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.