Photo: Quintin Soloviev · CC BY 4.0Precipitation in Haswell trails that of 94% of U.S. towns: 14 inches a year
In January the night’s low is typically 16°. Its July heat outdoes that of 86% of U.S. towns. The latest 30-year average runs 1.4° warmer than 1901–2000’s, with March up the most. Keep the boiler serviced for the months from November to March, which average under 50°.
A year in Haswell at a glance
Each month’s typical high and low, and what it brings.
What stands out about Haswell’s climate
Compared with towns across the U.S., with Haswell’s place in Colorado beside it.
What a year in Haswell feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 165 frost-free days a year
In half of years the last 32° night comes by April 30 and the first by October 13. Frost and day counts come from NOAA’s station at Eads, CO, 21 miles from the town’s center, 330 ft lower.
The 2023 USDA map puts Haswell’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. 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 27 inches of snow a winter
Snow, measured at Haswell, CO, falls mostly in March. Precipitation (rain plus melted snow) adds up to 14 inches a year; July is the wettest month and January the driest. Rain or snow falls on about 61 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Haswell
84% of the work is heating. 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 Eads, CO.
Living with Haswell’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
165 frost-free days in zone 5b. The last frost comes by Apr 30 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 13.
Months with highs of 62–84° and lows of 40° or more: May and September.
Parks & trails →Of the yearly building losses FEMA expects in Haswell from natural hazards, drought is the largest share (40%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Haswell and similar climates
TownRatings has no climate map of the towns around Haswell yet.
Climates most like Haswell’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 |
|---|---|---|---|---|
| Haswell, CO | 16° | 92° | 14" | 27" |
| Nephi, UT | 17° | 91° | 14" | 32" |
| Torrington, WY | 14° | 90° | 13" | 31" |
| Dalhart, TX | 21° | 92° | 16" | 20" |
| Sidney, NE | 15° | 89° | 17" | 29" |
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 Haswell averaged 1.4° warmer than the 1900s. The biggest change is in March (+3.2°).
A bigger shift than in 56% 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 Haswell compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Haswell’s place among Colorado’s.
Haswell weather by month
Highs, lows and precipitation from NOAA’s grid at Haswell’s center; snow, wet days and snow on the ground from Haswell, CO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 46° | 16° | 0.3" | 3.5" | 3 | 5 | 19° – 36° |
| February | 49° | 19° | 0.3" | 3.4" | 3 | 3 | 26° – 42° |
| March | 59° | 28° | 0.7" | 5.7" | 5 | 2 | 38° – 49° |
| April | 66° | 35° | 1.2" | 3.5" | 6 | 1 | 45° – 55° |
| May | 76° | 45° | 1.9" | 0.2" | 7 | 0 | 55° – 66° |
| June | 87° | 55° | 1.8" | 0.0" | 7 | 0 | 66° – 76° |
| July | 92° | 61° | 2.9" | 0.0" | 9 | 0 | 72° – 80° |
| August | 89° | 59° | 2.5" | 0.0" | 7 | 0 | 69° – 79° |
| September | 82° | 51° | 0.9" | 0.1" | 5 | 0 | 60° – 72° |
| October | 69° | 37° | 1.0" | 2.4" | 4 | 0 | 45° – 58° |
| November | 56° | 25° | 0.4" | 4.0" | 3 | 3 | 33° – 46° |
| December | 46° | 17° | 0.3" | 4.4" | 3 | 5 | 24° – 36° |
| Year | 68° | 37° | 14.1" | 27.2" | 61 | 18 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 19° to 36°. July is the most reliable, staying within 8°.
Where Haswell’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 Haswell’s center.
- Snow: Haswell, CO (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Eads, CO, 21 miles from the town’s center, 330 ft lower; 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 Haswell’s climate
What is the weather like in Haswell?
A typical July afternoon reaches 92°, a January night drops to 16°, and about 27 inches of snow falls in a normal winter. Colder January nights than 80% of U.S. towns; hotter July afternoons than 86% of U.S. towns.
How cold does it get in Haswell in winter?
January nights average 16°. About 156 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 19°.
How much snow does Haswell get?
About 27 inches in a normal winter at Haswell, CO, most of it in March, with snow on the ground about 18 days a year.
How hot does it get in Haswell?
July, with a typical high of 92° and a low of 61°. About 60 days a year reach 90° and 7 reach 100° (Eads, CO).
When is the first and last frost in Haswell?
In half of years the last spring frost (32°) comes by April 30 and the first fall frost by October 13, about 165 frost-free days, at Eads, CO.
What growing zone is Haswell in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Haswell?
By one simple rule (highs of 62–84° and lows of 40° or more), May and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Haswell getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 56% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Haswell.
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.