Fillmore, Utah climate: Normal weather by month, frost dates and records
Fillmore's normal year runs from 21°F December nights to 88°F July afternoons, with 15.0 inches of precipitation and 62 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.7°C, December lows of −6°C, July highs of 31°C, 382 mm of precipitation a year.
- NOAA stationFillmore
- Station IDUSC00422828
- Location38.96°N 112.32°W
- Elevation5,127 ft (1,563 m)
- Population2,788
On October 23, the normal high in Fillmore is 61°F and the normal low 37°F, and the chance of measurable rain or snow is 19%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Fillmore.
- Jan 38° 21°
- Feb 45° 25°
- Mar 55° 32°
- Apr 62° 37°
- May 72° 45°
- Jun 82° 53°
- Jul 88° 60°
- Aug 86° 60°
- Sep 78° 51°
- Oct 64° 39°
- Nov 50° 29°
- Dec 38° 21°
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 Fillmore each month?
July is the warmest month, with normal highs of 88°F; December the coldest, with normal lows of 21°F. The most precipitation falls in April (1.68 in), the least in June (0.67 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 38°F | 21°F | 29.6°F | 1.32 | 11.9 | 7 | <1 | 29 | 9 h 40 min |
| February | 45°F | 25°F | 34.7°F | 1.37 | 13.2 | 8 | <1 | 24 | 10 h 40 min |
| March | 55°F | 32°F | 43.5°F | 1.65 | 7.9 | 8 | <1 | 18 | 11 h 50 min |
| April | 62°F | 37°F | 49.4°F | 1.68 | 5.1 | 9 | <1 | 10 | 13 h 10 min |
| May | 72°F | 45°F | 58.4°F | 1.53 | 0.3 | 7 | 1 | 1 | 14 h 20 min |
| June | 82°F | 53°F | 67.8°F | 0.67 | 0.0 | 3 | 6 | <1 | 14 h 50 min |
| July | 88°F | 60°F | 74.4°F | 0.79 | 0.0 | 5 | 17 | <1 | 14 h 40 min |
| August | 86°F | 60°F | 73.1°F | 0.80 | 0.0 | 5 | 12 | <1 | 13 h 40 min |
| September | 78°F | 51°F | 64.4°F | 0.99 | 0.1 | 5 | 2 | <1 | 12 h 30 min |
| October | 64°F | 39°F | 51.8°F | 1.48 | 2.9 | 6 | <1 | 7 | 11 h 20 min |
| November | 50°F | 29°F | 39.2°F | 1.29 | 8.2 | 6 | <1 | 21 | 10 h 10 min |
| December | 38°F | 21°F | 29.2°F | 1.47 | 12.4 | 7 | <1 | 28 | 9 h 30 min |
| Year (annual) | 63°F | 39°F | 51.3°F | 15.04 | 62.0 | 75 | 37 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −6°C | −1.3°C | 34 mm | 30 cm |
| February | 7°C | −4°C | 1.5°C | 35 mm | 34 cm |
| March | 13°C | 0°C | 6.4°C | 42 mm | 20 cm |
| April | 17°C | 3°C | 9.7°C | 43 mm | 13 cm |
| May | 22°C | 7°C | 14.7°C | 39 mm | 1 cm |
| June | 28°C | 12°C | 19.9°C | 17 mm | 0 cm |
| July | 31°C | 16°C | 23.6°C | 20 mm | 0 cm |
| August | 30°C | 16°C | 22.8°C | 20 mm | 0 cm |
| September | 25°C | 11°C | 18.0°C | 25 mm | 0 cm |
| October | 18°C | 4°C | 11.0°C | 38 mm | 7 cm |
| November | 10°C | −2°C | 4.0°C | 33 mm | 21 cm |
| December | 3°C | −6°C | −1.6°C | 37 mm | 31 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00422828; 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 Fillmore?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, June has the fewest days with rain (3).
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 USC00422828.
When is the last frost in Fillmore?
In Fillmore, the last spring frost (32°F) comes after May 4 in half of years and after May 26 in one year in ten; the first autumn frost comes before October 14 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 41 year in 10 after May 26; 9 in 10 after April 18
- First autumn frost, half of years before
- October 141 year in 10 before September 30; 9 in 10 before October 28
NOAA puts the median frost-free season at 160 days, and the season without a hard freeze (28°F) at 186 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Fillmore in zone 6a in ZIP code 84631, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Fillmore's NOAA station is in zone 7a: the coldest night of a typical year reaches 1°F (22 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 Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00422828; 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 Fillmore?
In a normal year in Fillmore, 37 days a year reach 90°F (2 of them 100°F or more), 138 nights fall to 32°F or colder and 75 days bring measurable precipitation.
- Days at 90°F or more
- 37a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 21high of 32°F or less
- Days with 0.01 inch of precipitation
- 75a normal year
- Days with 1 inch of snow or more
- 20a normal year
The highest temperature in this station's record (since 1893) is 112°F, on July 20, 1901; the lowest is −23°F, on January 26, 1898.
The wettest calendar year on that record is 1983, with 25.33 in; the snowiest season is 1972–73, with 164.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00422828; records: ACIS (NOAA Regional Climate Centers), station USC00422828. Records use complete months only; a month missing more than three days is left out.
How sunny is Fillmore?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Fillmore, 5.1 kWh per square metre a day. June is the sunniest month (90%) and December the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 78% | 2.7 |
| February | 77% | 3.6 |
| March | 78% | 4.9 |
| April | 79% | 6.1 |
| May | 83% | 7.2 |
| June | 90% | 8.1 |
| July | 83% | 7.1 |
| August | 85% | 6.5 |
| September | 88% | 5.7 |
| October | 85% | 4.3 |
| November | 80% | 3.0 |
| December | 74% | 2.3 |
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 Fillmore need?
A normal year in Fillmore brings 5,769 heating degree days, 7% more than the median U.S. place (5,373), and 799 cooling degree days, 12% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,004 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,099 | 0 |
| February | 848 | 0 |
| March | 667 | 0 |
| April | 469 | 2 |
| May | 234 | 29 |
| June | 58 | 140 |
| July | 3 | 294 |
| August | 5 | 254 |
| September | 94 | 76 |
| October | 412 | 4 |
| November | 773 | 0 |
| December | 1,110 | 0 |
| Year (annual) | 5,769 | 799 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00422828. 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 Fillmore been warmer than normal lately?
2025 averaged 55.9°F, 4.6°F above the 1991-2020 normal of 51.3°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 53.7°F | +2.4°F | – | – |
| 2022 | 53.9°F | +2.6°F | – | – |
| 2025 | 55.9°F | +4.6°F | – | 24.5 |
Over 98 complete years from 1893 to 2025, the station's annual mean temperature rose at a fitted 0.9°F per century (+0.05°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00422828; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Fillmore's climate compare?
Fillmore is warmer than 67 of the other 96 places with their own NOAA record in Utah, and wetter than 58. Across the 7,247 U.S. stations with normals, its annual mean of 51.3°F is warmer than 46%.
In the Köppen classification computed from these normals, Fillmore is Dfa: continental, no dry season, hot 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 Fillmore share this climate record?
Holden 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.
- Holden, UT459 people · 10 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 Fillmore's climate
What is the coldest month in Fillmore?
December, with a normal high of 38°F and a normal low of 21°F. The warmest is July (88°F by day, 60°F at night).
Does it snow in Fillmore?
Yes: 62 inches in a normal year, falling on 26 days with 0.1 inch or more, the most in February (13.2 inches).
What is the rainiest month in Fillmore?
April, with 1.68 in of precipitation in a normal year; the driest is June with 0.67 in.
What plant hardiness zone is Fillmore in?
The USDA's 2023 map puts Fillmore in zone 6a in ZIP code 84631, the nearest ZIP area. By the same method at Fillmore's NOAA station, the coldest night of a typical year reaches 1°F (22 years, 1991-2020): zone 7a.
How late can frost come in Fillmore?
In half of years the last 32°F night comes after May 4; in one year in ten it comes after May 26. Waiting until May 26 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Kanosh, UT13 miles from this station, 53.7°F a year
- Richfield, UT19 miles from this station, 49.7°F a year
- Scipio, UT23 miles from this station, 49.5°F a year
- Fremont Indian State Park, UT27 miles from this station, 47.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made