Mormon Lake gets about 90 inches of snow a winter, more than 97% of U.S. towns
Peak summer warmth arrives in July, with afternoons near 80°. Temperatures cover 60° across the year, low to high. Summers stay cool: July afternoons here are cooler than in 91% of U.S. towns. The heating season runs October to April: each of those months averages under 50°.
A year in Mormon Lake at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mormon Lake’s climate
Compared with towns across the U.S., with Mormon Lake’s place in Arizona beside it.
What a year in Mormon Lake feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 124 frost-free days a year
In half of years the last 32° night comes by June 1 and the first by October 3. Frost and day counts come from NOAA’s station at Happy Jack Rs, AZ, 12 miles from the town’s center, 360 ft higher.
The 2023 USDA map puts Mormon Lake’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 90 inches of snow a winter
Snow, measured at Flagstaff Pulliam Airport, is heaviest from January through February, about 20 inches a month. Precipitation (rain plus melted snow) adds up to 21 inches a year; August is the wettest month and June the driest. Rain or snow falls on about 82 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Mormon Lake
99% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Happy Jack Rs, AZ.
Living with Mormon Lake’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
124 frost-free days in zone 6a. The last frost comes by Jun 1 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 3.
Months with highs of 62–84° and lows of 40° or more: June, July, August and September. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Mormon Lake from natural hazards, wildfire is the largest share (58%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mormon Lake and similar climates
TownRatings has no climate map of the towns around Mormon Lake yet.
Climates most like Mormon Lake’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 |
|---|---|---|---|---|
| Mormon Lake, AZ | 20° | 80° | 21" | 90" |
| Black Forest, CO | 16° | 81° | 20" | 121" |
| Whitefish, MT | 17° | 82° | 18" | 63" |
| Big Bear Lake, CA | 25° | 80° | 24" | 59" |
| Traverse City, MI | 17° | 79° | 32" | 101" |
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 Mormon Lake averaged 1.9° warmer than the 1900s. The biggest change is in March (+3.2°).
A bigger shift than in 85% 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 Mormon Lake compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mormon Lake’s place among Arizona’s.
Mormon Lake weather by month
Highs, lows and precipitation from NOAA’s grid at Mormon Lake’s center; snow, wet days and snow on the ground from Flagstaff Pulliam Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 43° | 20° | 2.2" | 20.9" | 7 | 20 | 25° – 37° |
| February | 45° | 21° | 2.4" | 19.3" | 8 | 14 | 28° – 40° |
| March | 51° | 26° | 2.0" | 15.6" | 7 | 7 | 31° – 44° |
| April | 58° | 30° | 0.9" | 5.0" | 5 | 1 | 37° – 48° |
| May | 67° | 37° | 0.8" | 1.1" | 5 | 0 | 46° – 56° |
| June | 77° | 45° | 0.4" | 0.0" | 2 | 0 | 56° – 65° |
| July | 80° | 52° | 2.6" | 0.0" | 12 | 0 | 63° – 69° |
| August | 78° | 51° | 3.3" | 0.0" | 13 | 0 | 62° – 69° |
| September | 72° | 45° | 1.9" | 0.0" | 8 | 0 | 55° – 61° |
| October | 62° | 35° | 1.4" | 1.5" | 5 | 0 | 45° – 53° |
| November | 51° | 26° | 1.5" | 8.2" | 4 | 4 | 31° – 46° |
| December | 42° | 20° | 2.0" | 18.5" | 7 | 16 | 26° – 37° |
| Year | 61° | 34° | 21.4" | 90.1" | 82 | 62 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 31° to 46°. September is the most reliable, staying within 6°.
Where Mormon Lake’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 Mormon Lake’s center.
- Snow: Flagstaff Pulliam Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Happy Jack Rs, AZ, 12 miles from the town’s center, 360 ft higher; 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 Mormon Lake’s climate
What is the weather like in Mormon Lake?
A typical July afternoon reaches 80°, a January night drops to 20°, and about 90 inches of snow falls in a normal winter. Colder January nights than 60% of U.S. towns; cooler July afternoons than 91% of U.S. towns.
How cold does it get in Mormon Lake in winter?
January nights average 20°. About 198 nights a year reach 32° or below and 5 reach 0° or below. In the coldest January of the last 30 years the month averaged 25°.
How much snow does Mormon Lake get?
About 90 inches in a normal winter at Flagstaff Pulliam Airport, heaviest from January through February, about 20 inches a month, with snow on the ground about 62 days a year.
How hot does it get in Mormon Lake?
July, with a typical high of 80° and a low of 52°. About 1 days a year reach 90° (Happy Jack Rs, AZ).
When is the first and last frost in Mormon Lake?
In half of years the last spring frost (32°) comes by June 1 and the first fall frost by October 3, about 124 frost-free days, at Happy Jack Rs, AZ.
What growing zone is Mormon Lake 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 Mormon Lake?
By one simple rule (highs of 62–84° and lows of 40° or more), June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mormon Lake getting warmer?
Yes: 1991–2020 averaged 1.9° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 85% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mormon Lake.
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.