Weber River Railroad Bridge · Photo: Ntsimp · CC0Dry weather: only 23 inches of rain and melted snow a year in Mountain Green, less than in 88% of U.S. towns
January nights here settle around 17°. Winter nights are cold: in January they are colder than in 78% of U.S. towns. The latest 30-year average runs 1.8° warmer than 1901–2000’s, with March up the most. Tender plants can go out after about April 29; in half of years the first frost comes by October 20.
A year in Mountain Green at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mountain Green’s climate
Compared with towns across the U.S., with Mountain Green’s place in Utah beside it.
What a year in Mountain Green feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 172 frost-free days a year
In half of years the last 32° night comes by April 29 and the first by October 20. Frost and day counts come from NOAA’s station at Weber Basin Pump Plt 3, UT, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Mountain Green’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −8°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 23 inches of snow a winter
Snow, measured at Weber Basin Pump Plt 3, UT, falls mostly in December. Precipitation (rain plus melted snow) adds up to 23 inches a year; January is the wettest month and July the driest. Rain or snow falls on about 90 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mountain Green
87% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Weber Basin Pump Plt 3, UT.
Living with Mountain Green’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
172 frost-free days in zone 6a. The last frost comes by Apr 29 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 20.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 11 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mountain Green from natural hazards, river flooding is the largest share (40%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mountain Green and similar climates
TownRatings has no climate map of the towns around Mountain Green yet.
Climates most like Mountain Green’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Mountain Green, UT | 17° | 90° | 23" | 23" |
| North Platte, NE | 14° | 89° | 21" | 28" |
| Colby, KS | 17° | 91° | 20" | 27" |
| Fountain, CO | 18° | 89° | 16" | 33" |
| Belle Fourche, SD | 13° | 88° | 19" | 42" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Mountain Green averaged 1.8° warmer than the 1900s. The biggest change is in March (+3.6°).
A bigger shift than in 80% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Mountain Green compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mountain Green’s place among Utah’s.
Mountain Green weather by month
Highs, lows and precipitation from NOAA’s grid at Mountain Green’s center; snow, wet days and snow on the ground from Weber Basin Pump Plt 3, UT. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 36° | 17° | 2.7" | 3.9" | 9 | 9 | 18° – 33° |
| February | 41° | 20° | 2.4" | 4.1" | 10 | 5 | 25° – 39° |
| March | 51° | 29° | 2.2" | 1.7" | 10 | 2 | 35° – 45° |
| April | 59° | 34° | 2.5" | 0.1" | 10 | 0 | 41° – 52° |
| May | 69° | 42° | 2.5" | 0.2" | 9 | 0 | 50° – 60° |
| June | 80° | 49° | 1.4" | 0.0" | 5 | 0 | 58° – 70° |
| July | 90° | 56° | 0.7" | 0.0" | 3 | 0 | 64° – 77° |
| August | 88° | 54° | 0.9" | 0.0" | 4 | 0 | 66° – 75° |
| September | 78° | 46° | 1.5" | 0.0" | 6 | 0 | 58° – 65° |
| October | 63° | 35° | 2.0" | 0.2" | 7 | 0 | 41° – 55° |
| November | 48° | 26° | 1.9" | 1.3" | 8 | 1 | 29° – 44° |
| December | 36° | 18° | 2.5" | 11.3" | 9 | 8 | 20° – 33° |
| Year | 62° | 35° | 23.1" | 22.8" | 90 | 25 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 18° to 33°. September is the most reliable, staying within 8°.
Where Mountain Green’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Mountain Green’s center.
- Snow: Weber Basin Pump Plt 3, UT.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Weber Basin Pump Plt 3, UT, 7 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Mountain Green’s climate
What is the weather like in Mountain Green?
A typical July afternoon reaches 90°, a January night drops to 17°, and about 23 inches of snow falls in a normal winter. Colder January nights than 78% of U.S. towns; hotter July afternoons than 75% of U.S. towns.
How cold does it get in Mountain Green in winter?
January nights average 17°. About 132 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 18°.
How much snow does Mountain Green get?
About 23 inches in a normal winter at Weber Basin Pump Plt 3, UT, most of it in December, with snow on the ground about 25 days a year.
How hot does it get in Mountain Green?
July, with a typical high of 90° and a low of 56°. About 41 days a year reach 90° and 3 reach 100° (Weber Basin Pump Plt 3, UT).
When is the first and last frost in Mountain Green?
In half of years the last spring frost (32°) comes by April 29 and the first fall frost by October 20, about 172 frost-free days, at Weber Basin Pump Plt 3, UT.
What growing zone is Mountain Green in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −8°.
What is the best time of year to visit Mountain Green?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mountain Green getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 80% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mountain Green.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.