Big Water, Utah climate: Normal weather by month, frost dates and records
Big Water's normal year runs from 23°F January nights to 98°F July afternoons, with 7.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 14.2°C, January lows of −5°C, July highs of 37°C, 195 mm of precipitation a year.
- NOAA stationBig Water
- Station IDUSC00420688
- Location37.08°N 111.66°W
- Elevation4,100 ft (1,250 m)
- Population535
On October 24, the normal high in Big Water is 68°F and the normal low 40°F, and the chance of measurable rain or snow is 12%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Big Water.
- Jan 45° 23°
- Feb 52° 28°
- Mar 63° 35°
- Apr 71° 41°
- May 81° 50°
- Jun 93° 59°
- Jul 98° 67°
- Aug 95° 65°
- Sep 87° 56°
- Oct 72° 44°
- Nov 57° 32°
- Dec 45° 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 Big Water each month?
July is the warmest month, with normal highs of 98°F; January the coldest, with normal lows of 23°F. The most precipitation falls in October (1.00 in), the least in June (0.20 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 45°F | 23°F | 34.2°F | 0.72 | 4 | <1 | 28 | 9 h 50 min |
| February | 52°F | 28°F | 40.3°F | 0.81 | 5 | <1 | 20 | 10 h 50 min |
| March | 63°F | 35°F | 48.6°F | 0.72 | 5 | <1 | 10 | 11 h 50 min |
| April | 71°F | 41°F | 56.1°F | 0.53 | 3 | 1 | 2 | 13 h 10 min |
| May | 81°F | 50°F | 65.3°F | 0.51 | 3 | 7 | <1 | 14 h 10 min |
| June | 93°F | 59°F | 76.2°F | 0.20 | 2 | 24 | <1 | 14 h 40 min |
| July | 98°F | 67°F | 82.4°F | 0.47 | 4 | 30 | <1 | 14 h 30 min |
| August | 95°F | 65°F | 79.9°F | 0.91 | 5 | 27 | <1 | 13 h 40 min |
| September | 87°F | 56°F | 71.5°F | 0.81 | 4 | 13 | <1 | 12 h 30 min |
| October | 72°F | 44°F | 57.8°F | 1.00 | 4 | 1 | 2 | 11 h 20 min |
| November | 57°F | 32°F | 44.2°F | 0.43 | 2 | <1 | 15 | 10 h 10 min |
| December | 45°F | 25°F | 34.7°F | 0.56 | 4 | <1 | 27 | 9 h 40 min |
| Year (annual) | 72°F | 44°F | 57.6°F | 7.67 | 45 | 101 | 103 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 7°C | −5°C | 1.2°C | 18 mm |
| February | 11°C | −2°C | 4.6°C | 21 mm |
| March | 17°C | 1°C | 9.2°C | 18 mm |
| April | 22°C | 5°C | 13.4°C | 13 mm |
| May | 27°C | 10°C | 18.5°C | 13 mm |
| June | 34°C | 15°C | 24.6°C | 5 mm |
| July | 37°C | 19°C | 28.0°C | 12 mm |
| August | 35°C | 18°C | 26.6°C | 23 mm |
| September | 30°C | 13°C | 21.9°C | 21 mm |
| October | 22°C | 6°C | 14.3°C | 25 mm |
| November | 14°C | 0°C | 6.8°C | 11 mm |
| December | 7°C | −4°C | 1.5°C | 14 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Wahweap (11 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00420688; 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 Big Water?
Normal highs sit between 65°F and 85°F in April, May and October. Of those, April 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 USC00420688.
When is the last frost in Big Water?
In Big Water, the last spring frost (32°F) comes after April 8 in half of years and after April 28 in one year in ten; the first autumn frost comes before November 1 in half of years and before October 18 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
- April 81 year in 10 after April 28; 9 in 10 after March 19
- First autumn frost, half of years before
- November 11 year in 10 before October 18; 9 in 10 before November 13
NOAA puts the median frost-free season at 204 days, and the season without a hard freeze (28°F) at 231 days.
A hard freeze (28°F) comes after March 21 in half of springs and before November 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Big Water in zone 7b in ZIP code 86036, the nearest ZIP area.
Frost dates for every NOAA station in Utah · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00420688; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 Big Water?
In a normal year in Big Water, 101 days a year reach 90°F (30 of them 100°F or more), 103 nights fall to 32°F or colder and 45 days bring measurable precipitation.
- Days at 90°F or more
- 101a normal year
- Days at 100°F or more
- 30a normal year
- Nights at 32°F or colder
- 103a normal year
- Days that stay below freezing
- 2high of 32°F or less
- Days with 0.01 inch of precipitation
- 45a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00420688.
How sunny is Big Water?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Big Water, 5.3 kWh per square metre a day. June is the sunniest month (91%) and February the cloudiest (78%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 80% | 2.8 |
| February | 78% | 3.7 |
| March | 84% | 5.3 |
| April | 85% | 6.6 |
| May | 86% | 7.5 |
| June | 91% | 8.3 |
| July | 85% | 7.3 |
| August | 84% | 6.5 |
| September | 88% | 5.8 |
| October | 86% | 4.4 |
| November | 85% | 3.2 |
| December | 78% | 2.5 |
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 Big Water need?
A normal year in Big Water brings 4,353 heating degree days, 19% fewer than the median U.S. place (5,373), and 1,682 cooling degree days, 85% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,391 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 953 | 0 |
| February | 693 | 0 |
| March | 510 | 0 |
| April | 277 | 8 |
| May | 91 | 99 |
| June | 5 | 341 |
| July | 0 | 541 |
| August | 0 | 460 |
| September | 19 | 214 |
| October | 242 | 18 |
| November | 624 | 0 |
| December | 939 | 0 |
| Year (annual) | 4,353 | 1,682 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00420688. 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 Big Water been warmer than normal lately?
2025 averaged 60.2°F, 2.6°F above the 1991-2020 normal of 57.6°F. 2 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 59.1°F | +1.5°F | 4.90 |
| 2023 | 57.1°F | −0.5°F | – |
| 2025 | 60.2°F | +2.6°F | – |
Source: observed years: ACIS, station USC00420688. A year counts only with all twelve months complete.
How does Big Water's climate compare?
Big Water is warmer than 92 of the other 96 places with their own NOAA record in Utah, and wetter than 7. Across the 7,247 U.S. stations with normals, its annual mean of 57.6°F is warmer than 68%.
In the Köppen classification computed from these normals, Big Water is BWk: cold 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 Big Water share this climate record?
Greenehaven 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.
- Greenehaven, AZ339 people · 8 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 Big Water's climate
What is the coldest month in Big Water?
January, with a normal high of 45°F and a normal low of 23°F. The warmest is July (98°F by day, 67°F at night).
Does it snow in Big Water?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Big Water's NOAA station; the nearest record that keeps one, Wahweap (11 miles away), records 1 inches of snow in a normal year.
What is the rainiest month in Big Water?
October, with 1.00 in of precipitation in a normal year; the driest is June with 0.20 in.
What plant hardiness zone is Big Water in?
The USDA's 2023 map puts Big Water in zone 7b in ZIP code 86036, the nearest ZIP area.
How late can frost come in Big Water?
In half of years the last 32°F night comes after April 8; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Utah climateThe statewide normals and every place in the state
- Wahweap, AZ11 miles from this station, 61.2°F a year
- Paria Ranger Station, UT13 miles from this station, 56.1°F a year
- Lees Ferry, AZ15 miles from this station, 63.1°F a year
- Page, AZ16 miles from this station, 60.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made