Photo: Unknown authorUnknown author · Public domainGranger’s winters are colder than most of the U.S.; July afternoons average 86°
A typical July afternoon reaches 86°, a January night drops to 6°.
A year in Granger at a glance
Each month’s typical high and low, and what it brings.
What stands out about Granger’s climate
Compared with towns across the U.S., with Granger’s place in Wyoming beside it.
What a year in Granger feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 7 inches of rain a year
May is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Living with Granger’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 4b.
Months with highs of 62–84° and lows of 40° or more: June and August. 2.8 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Granger from natural hazards, river flooding is the largest share (86%); heat waves, cold waves, winter storms and ice storms together are 6%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Granger and similar climates
TownRatings has no climate map of the towns around Granger yet.
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 Granger averaged 1.2° warmer than the 1900s. The biggest change is in March (+3.3°).
A smaller shift than in 60% 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 Granger compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Granger’s place among Wyoming’s.
Granger weather by month
Highs, lows and precipitation from NOAA’s grid at Granger’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 31° | 6° | 0.3" | 10° – 27° |
| February | 34° | 9° | 0.3" | 10° – 31° |
| March | 46° | 20° | 0.4" | 25° – 38° |
| April | 55° | 26° | 0.7" | 34° – 46° |
| May | 66° | 35° | 1.2" | 44° – 55° |
| June | 77° | 43° | 0.8" | 54° – 65° |
| July | 86° | 49° | 0.5" | 59° – 72° |
| August | 84° | 47° | 0.8" | 60° – 68° |
| September | 74° | 38° | 0.9" | 52° – 60° |
| October | 59° | 27° | 0.8" | 35° – 49° |
| November | 43° | 17° | 0.3" | 18° – 37° |
| December | 31° | 7° | 0.3" | 12° – 28° |
| Year | 57° | 27° | 7.1" |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 31°. August is the most reliable, staying within 8°.
Where Granger’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 Granger’s center.
- 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 Granger’s climate
What is the weather like in Granger?
A typical July afternoon reaches 86°, a January night drops to 6°. Colder January nights than 97% of U.S. towns; hotter July afternoons than 55% of U.S. towns.
How cold does it get in Granger in winter?
January nights average 6°. About 196 nights a year reach 32° or below and 13 reach 0° or below. In the coldest January of the last 30 years the month averaged 10°.
How hot does it get in Granger?
July, with a typical high of 86° and a low of 49°. About 6 days a year reach 90°.
What growing zone is Granger in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −22°.
What is the best time of year to visit Granger?
By one simple rule (highs of 62–84° and lows of 40° or more), June and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Granger getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 60% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Granger.
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.