Dry weather: only 15 inches of rain and melted snow a year in Sleepy Hollow, less than in 93% of U.S. towns
January mornings start at about 13°. Precipitation peaks in May and eases off in January. Winter nights are cold: in January they are colder than in 90% of U.S. towns. Keep the boiler serviced for the months from October to April, which average under 50°.
A year in Sleepy Hollow at a glance
Each month’s typical high and low, and what it brings.
What stands out about Sleepy Hollow’s climate
Compared with towns across the U.S., with Sleepy Hollow’s place in Wyoming beside it.
What a year in Sleepy Hollow feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 136 frost-free days a year
In half of years the last 32° night comes by May 15 and the first by October 1. Frost and day counts come from NOAA’s station at Gillette 4se, WY, 2.5 miles from the town’s center, at about the same height.
The 2023 USDA map puts Sleepy Hollow’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −17°. 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 56 inches of snow a winter
Snow, measured at Gillette 4se, WY, is heaviest from February through April, about 9 inches a month. Precipitation (rain plus melted snow) adds up to 15 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 100 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Sleepy Hollow
93% 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 Gillette 4se, WY.
Living with Sleepy Hollow’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
136 frost-free days in zone 5a. The last frost comes by May 15 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 1.
Months with highs of 62–84° and lows of 40° or more: June and September. 0.4 miles of trails are waiting.
Parks & trails →Cold waves are 37% of the yearly building losses FEMA expects in Sleepy Hollow from natural hazards, the largest share. Normals are averages; the hazards page covers the extremes.
Natural hazards →Sleepy Hollow and similar climates
TownRatings has no climate map of the towns around Sleepy Hollow yet.
Climates most like Sleepy Hollow’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 |
|---|---|---|---|---|
| Sleepy Hollow, WY | 13° | 86° | 15" | 56" |
| Durango, CO | 12° | 86° | 18" | 64" |
| Rigby, ID | 12° | 85° | 12" | 66" |
| Great Falls, MT | 13° | 84° | 13" | 66" |
| Doney Park, AZ | 17° | 86° | 16" | 52" |
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 Sleepy Hollow averaged 1.7° warmer than the 1900s. The biggest change is in January (+4.4°).
A bigger shift than in 75% 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 Sleepy Hollow compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Sleepy Hollow’s place among Wyoming’s.
Sleepy Hollow weather by month
Highs, lows and precipitation from NOAA’s grid at Sleepy Hollow’s center; snow, wet days and snow on the ground from Gillette 4se, WY. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 34° | 13° | 0.4" | 8.2" | 8 | 16 | 15° – 34° |
| February | 36° | 14° | 0.6" | 9.0" | 8 | 14 | 11° – 35° |
| March | 47° | 22° | 0.9" | 8.6" | 8 | 8 | 23° – 45° |
| April | 55° | 29° | 1.9" | 9.4" | 11 | 4 | 35° – 47° |
| May | 65° | 39° | 2.9" | 1.3" | 13 | 0 | 46° – 58° |
| June | 76° | 48° | 2.3" | 0.1" | 10 | 0 | 55° – 69° |
| July | 86° | 55° | 1.6" | 0.0" | 8 | 0 | 61° – 76° |
| August | 85° | 53° | 1.2" | 0.0" | 6 | 0 | 63° – 74° |
| September | 74° | 43° | 1.1" | 0.5" | 6 | 0 | 52° – 64° |
| October | 59° | 31° | 1.4" | 4.4" | 8 | 2 | 36° – 51° |
| November | 45° | 21° | 0.6" | 5.8" | 6 | 7 | 21° – 43° |
| December | 35° | 13° | 0.5" | 8.4" | 7 | 14 | 14° – 30° |
| Year | 58° | 32° | 15.4" | 55.7" | 100 | 66 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 11° to 35°. August is the most reliable, staying within 10°.
Where Sleepy Hollow’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 Sleepy Hollow’s center.
- Snow: Gillette 4se, WY.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Gillette 4se, WY, 2.5 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 Sleepy Hollow’s climate
What is the weather like in Sleepy Hollow?
A typical July afternoon reaches 86°, a January night drops to 13°, and about 56 inches of snow falls in a normal winter. Colder January nights than 90% of U.S. towns; hotter July afternoons than 54% of U.S. towns.
How cold does it get in Sleepy Hollow in winter?
January nights average 13°. About 174 nights a year reach 32° or below and 15 reach 0° or below. In the coldest January of the last 30 years the month averaged 15°.
How much snow does Sleepy Hollow get?
About 56 inches in a normal winter at Gillette 4se, WY, heaviest from February through April, about 9 inches a month, with snow on the ground about 66 days a year.
How hot does it get in Sleepy Hollow?
July, with a typical high of 86° and a low of 55°. About 28 days a year reach 90° and 1 reach 100° (Gillette 4se, WY).
When is the first and last frost in Sleepy Hollow?
In half of years the last spring frost (32°) comes by May 15 and the first fall frost by October 1, about 136 frost-free days, at Gillette 4se, WY.
What growing zone is Sleepy Hollow in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −17°.
What is the best time of year to visit Sleepy Hollow?
By one simple rule (highs of 62–84° and lows of 40° or more), June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Sleepy Hollow getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Sleepy Hollow.
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.