Photo: Jeffrey Beall · CC BY 4.0Dry weather: only 17 inches of rain and melted snow a year in Lynn, less than in 92% of U.S. towns
Deep winter brings January lows near 19°. Only 68° separates winter nights from summer afternoons. In January, nights here are colder than in 67% of U.S. towns. For walks and days out, May, June and September bring highs of 73–84°.
A year in Lynn at a glance
Each month’s typical high and low, and what it brings.
What stands out about Lynn’s climate
Compared with towns across the U.S., with Lynn’s place in Colorado beside it.
What a year in Lynn feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 149 frost-free days a year
In half of years the last 32° night comes by May 6 and the first by October 4. Frost and day counts come from NOAA’s station at Walsenburg 1 Nw, CO, 17 miles from the town’s center, at about the same height.
The 2023 USDA map puts Lynn’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 77 inches of snow a winter
Snow, measured at Aguilar, CO, falls mostly in March and November. Precipitation (rain plus melted snow) adds up to 17 inches a year; July is the wettest month and January the driest. Rain or snow falls on about 86 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Lynn
90% 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 Walsenburg 1 Nw, CO.
Living with Lynn’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
149 frost-free days in zone 6a. The last frost comes by May 6 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 4.
Months with highs of 62–84° and lows of 40° or more: May, June and September.
Parks & trails →Of the yearly building losses FEMA expects in Lynn from natural hazards, river flooding is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 14%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Lynn and similar climates
TownRatings has no climate map of the towns around Lynn yet.
Climates most like Lynn’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 |
|---|---|---|---|---|
| Lynn, CO | 19° | 87° | 17" | 77" |
| Pocatello, ID | 19° | 87° | 15" | 64" |
| Cheyenne, WY | 16° | 85° | 15" | 65" |
| Livingston, MT | 17° | 85° | 14" | 63" |
| Midway, UT | 13° | 88° | 16" | 75" |
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 Lynn averaged 1.3° warmer than the 1900s. The biggest change is in March (+2.9°).
A smaller shift than in 51% 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 Lynn compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Lynn’s place among Colorado’s.
Lynn weather by month
Highs, lows and precipitation from NOAA’s grid at Lynn’s center; snow, wet days and snow on the ground from Aguilar, CO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 48° | 19° | 0.6" | 9.2" | 4 | 25° – 38° |
| February | 49° | 20° | 0.6" | 8.3" | 4 | 29° – 42° |
| March | 57° | 27° | 1.4" | 15.9" | 8 | 38° – 48° |
| April | 64° | 32° | 1.9" | 12.0" | 7 | 42° – 53° |
| May | 73° | 42° | 1.8" | 1.3" | 9 | 52° – 62° |
| June | 84° | 51° | 1.4" | 0.0" | 9 | 62° – 72° |
| July | 87° | 56° | 2.7" | 0.0" | 12 | 68° – 76° |
| August | 84° | 54° | 2.5" | 0.0" | 13 | 66° – 73° |
| September | 78° | 47° | 1.3" | 0.0" | 7 | 57° – 68° |
| October | 67° | 35° | 1.2" | 3.5" | 5 | 45° – 57° |
| November | 55° | 26° | 0.8" | 14.5" | 6 | 32° – 47° |
| December | 47° | 19° | 0.8" | 12.1" | 4 | 27° – 38° |
| Year | 66° | 36° | 16.9" | 76.8" | 86 |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 32° to 47°. August is the most reliable, staying within 7°.
Where Lynn’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 Lynn’s center.
- Snow: Aguilar, CO (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Walsenburg 1 Nw, CO, 17 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 Lynn’s climate
What is the weather like in Lynn?
A typical July afternoon reaches 87°, a January night drops to 19°, and about 77 inches of snow falls in a normal winter. Colder January nights than 67% of U.S. towns; hotter July afternoons than 62% of U.S. towns.
How cold does it get in Lynn in winter?
January nights average 19°. About 137 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 25°.
How much snow does Lynn get?
About 77 inches in a normal winter at Aguilar, CO, most of it in March and November.
How hot does it get in Lynn?
July, with a typical high of 87° and a low of 56°. About 34 days a year reach 90° (Walsenburg 1 Nw, CO).
When is the first and last frost in Lynn?
In half of years the last spring frost (32°) comes by May 6 and the first fall frost by October 4, about 149 frost-free days, at Walsenburg 1 Nw, CO.
What growing zone is Lynn 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 Lynn?
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 Lynn getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 51% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Lynn.
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.