Photo: Amraider1997 · CC BY-SA 4.0Afternoon heat in Grenola beats that of 81% of U.S. towns
Midwinter brings lows of about 22°. Precipitation is light here, less than falls on 62% of U.S. towns. Since 1901–2000, the year has warmed by 0.5°, most of all in January. Garden planting can start around April 17; autumn frost returns near October 22.
A year in Grenola at a glance
Each month’s typical high and low, and what it brings.
What stands out about Grenola’s climate
Compared with towns across the U.S., with Grenola’s place in Kansas beside it.
What a year in Grenola feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 186 frost-free days a year
In half of years the last 32° night comes by April 17 and the first by October 22. Frost and day counts come from NOAA’s station at Howard, KS, 13 miles from the town’s center, 110 ft lower.
The 2023 USDA map puts Grenola’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 0°. 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 9 inches of snow a winter
Snow, measured at Grenola 1 N, KS, falls mostly in December. Precipitation (rain plus melted snow) adds up to 40 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 74 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Grenola
77% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Howard, KS.
Living with Grenola’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
186 frost-free days in zone 7a. The last frost comes by Apr 17 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 22.
Months with highs of 62–84° and lows of 40° or more: April, May, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Grenola from natural hazards, river flooding is the largest share (37%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Grenola and similar climates
TownRatings has no climate map of the towns around Grenola yet.
Climates most like Grenola’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 |
|---|---|---|---|---|
| Grenola, KS | 22° | 91° | 40" | 8.9" |
| Clinton, MO | 22° | 89° | 42" | 11" |
| Columbia, IL | 24° | 89° | 42" | 8.8" |
| Fredericksburg, VA | 25° | 89° | 43" | 11" |
| Washington, DC | 27° | 89° | 44" | 5.8" |
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 Grenola averaged 0.5° warmer than the 1900s. The biggest change is in January (+1.8°).
A smaller shift than in 98% 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 Grenola compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Grenola’s place among Kansas’.
Grenola weather by month
Highs, lows and precipitation from NOAA’s grid at Grenola’s center; snow, wet days and snow on the ground from Grenola 1 N, KS. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 44° | 22° | 1.1" | 2.6" | 4 | 2 | 27° – 43° |
| February | 49° | 26° | 1.6" | 1.9" | 5 | 1 | 30° – 46° |
| March | 59° | 35° | 2.8" | 1.2" | 7 | 0 | 41° – 57° |
| April | 69° | 45° | 3.9" | 0.0" | 7 | 0 | 49° – 63° |
| May | 77° | 55° | 5.9" | 0.0" | 10 | 0 | 61° – 73° |
| June | 85° | 64° | 5.7" | 0.0" | 8 | 0 | 70° – 79° |
| July | 91° | 69° | 4.1" | 0.0" | 7 | 0 | 74° – 87° |
| August | 90° | 67° | 3.9" | 0.0" | 6 | 0 | 72° – 86° |
| September | 82° | 59° | 3.5" | 0.0" | 6 | 0 | 66° – 78° |
| October | 71° | 46° | 3.5" | 0.0" | 6 | 0 | 51° – 63° |
| November | 58° | 34° | 2.2" | 0.3" | 5 | 0 | 39° – 54° |
| December | 46° | 26° | 1.6" | 2.9" | 4 | 1 | 25° – 41° |
| Year | 68° | 46° | 39.6" | 8.9" | 74 | 5 |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 41° to 57°. June is the most reliable, staying within 9°.
Where Grenola’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 Grenola’s center.
- Snow: Grenola 1 N, KS (NOAA station in town).
- Frost, freezing nights, 90° and 100° days, heating and cooling: Howard, KS, 13 miles from the town’s center, 110 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 Grenola’s climate
What is the weather like in Grenola?
A typical July afternoon reaches 91°, a January night drops to 22°, and about 9 inches of snow falls in a normal winter. Milder January nights than 52% of U.S. towns; hotter July afternoons than 81% of U.S. towns.
How cold does it get in Grenola in winter?
January nights average 22°. About 115 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 27°.
How much snow does Grenola get?
About 8.9 inches in a normal winter at Grenola 1 N, KS, most of it in December, with snow on the ground about 5 days a year.
How hot does it get in Grenola?
July, with a typical high of 91° and a low of 69°. About 50 days a year reach 90° and 8 reach 100° (Howard, KS).
When is the first and last frost in Grenola?
In half of years the last spring frost (32°) comes by April 17 and the first fall frost by October 22, about 186 frost-free days, at Howard, KS.
What growing zone is Grenola in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 0°.
What is the best time of year to visit Grenola?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Grenola getting warmer?
Yes: 1991–2020 averaged 0.5° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 98% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Grenola.
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.