Dry weather: only 16 inches of rain and melted snow a year in Genoa, less than in 92% of U.S. towns
On a normal July day the thermometer tops out near 88°. By January nights alone, it runs colder than 85% of U.S. towns. March has warmed most since 1901–2000, part of a 1.3° rise. Central heating does most of its work from October to April, in months below 50° on average.
A year in Genoa at a glance
Each month’s typical high and low, and what it brings.
What stands out about Genoa’s climate
Compared with towns across the U.S., with Genoa’s place in Colorado beside it.
What a year in Genoa feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 143 frost-free days a year
In half of years the last 32° night comes by May 10 and the first by October 2. Day counts come from NOAA’s station at Genoa, CO, 0.2 miles from the town’s center, at about the same height; frost dates and degree days from Hugo 1 Nw, CO, 9 miles away.
The 2023 USDA map puts Genoa’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −12°. 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 24 inches of snow a winter
Snow, measured at Hugo 1 Nw, CO, is heaviest from February through March, about 4 inches a month. Precipitation (rain plus melted snow) adds up to 16 inches a year; July is the wettest month and December the driest. Rain or snow falls on about 53 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Genoa
91% 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 Hugo 1 Nw, CO.
Living with Genoa’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
143 frost-free days in zone 5b. The last frost comes by May 10 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 2.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 0.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Genoa from natural hazards, river flooding is the largest share (39%); heat waves, cold waves, winter storms and ice storms together are 19%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Genoa and similar climates
TownRatings has no climate map of the towns around Genoa yet.
Climates most like Genoa’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 |
|---|---|---|---|---|
| Genoa, CO | 15° | 88° | 16" | 24" |
| Lockwood, MT | 15° | 88° | 15" | 35" |
| Ephraim, UT | 14° | 89° | 12" | 20" |
| White Rock, NM | 18° | 89° | 13" | 20" |
| Sheridan, WY | 11° | 89° | 15" | 33" |
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 Genoa averaged 1.3° warmer than the 1900s. The biggest change is in March (+3.1°).
A smaller shift than in 57% 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 Genoa compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Genoa’s place among Colorado’s.
Genoa weather by month
Highs, lows and precipitation from NOAA’s grid at Genoa’s center; snow, wet days and snow on the ground from Hugo 1 Nw, CO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 44° | 15° | 0.3" | 3.2" | 2 | 4 | 19° – 36° |
| February | 45° | 17° | 0.4" | 4.2" | 2 | 5 | 25° – 38° |
| March | 55° | 24° | 0.7" | 4.6" | 3 | 3 | 34° – 46° |
| April | 61° | 31° | 1.4" | 4.1" | 5 | 2 | 40° – 52° |
| May | 71° | 41° | 2.3" | 0.4" | 7 | 0 | 49° – 61° |
| June | 82° | 50° | 2.4" | 0.0" | 7 | 0 | 62° – 72° |
| July | 88° | 56° | 2.8" | 0.0" | 8 | 0 | 68° – 76° |
| August | 85° | 55° | 2.8" | 0.0" | 7 | 0 | 66° – 75° |
| September | 78° | 46° | 1.1" | 0.0" | 4 | 0 | 57° – 68° |
| October | 65° | 33° | 0.9" | 2.2" | 4 | 1 | 40° – 55° |
| November | 52° | 23° | 0.4" | 2.1" | 2 | 2 | 29° – 44° |
| December | 43° | 16° | 0.3" | 3.6" | 2 | 4 | 23° – 34° |
| Year | 64° | 34° | 15.7" | 24.4" | 53 | 20 |
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 Genoa’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 Genoa’s center.
- Snow: Hugo 1 Nw, CO.
- Frost dates, heating and cooling: Hugo 1 Nw, CO, 9 miles away.
- Freezing nights, 90° and 100° days: Genoa, CO, 0.2 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 Genoa’s climate
What is the weather like in Genoa?
A typical July afternoon reaches 88°, a January night drops to 15°, and about 24 inches of snow falls in a normal winter. Colder January nights than 85% of U.S. towns; hotter July afternoons than 68% of U.S. towns.
How cold does it get in Genoa in winter?
January nights average 15°. About 148 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 Genoa get?
About 24 inches in a normal winter at Hugo 1 Nw, CO, heaviest from February through March, about 4 inches a month, with snow on the ground about 20 days a year.
How hot does it get in Genoa?
July, with a typical high of 88° and a low of 56°. About 28 days a year reach 90° (Hugo 1 Nw, CO).
When is the first and last frost in Genoa?
In half of years the last spring frost (32°) comes by May 10 and the first fall frost by October 2, about 143 frost-free days, at Hugo 1 Nw, CO.
What growing zone is Genoa in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −12°.
What is the best time of year to visit Genoa?
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 Genoa getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 57% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Genoa.
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.