Summers, winters and rain in Henrietta all run close to those of most U.S. towns
On a normal July day the thermometer tops out near 88°. May is the wettest month, January the driest. By July afternoons alone, it runs hotter than 69% of U.S. towns. Plan time outside for April, May, September and October, when highs sit at 66–80°.
A year in Henrietta at a glance
Each month’s typical high and low, and what it brings.
What stands out about Henrietta’s climate
Compared with towns across the U.S., with Henrietta’s place in Missouri beside it.
What a year in Henrietta feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 180 frost-free days a year
In half of years the last 32° night comes by April 19 and the first by October 18. Frost and day counts come from NOAA’s station at Richmond 3s, MO, 1.7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Henrietta’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −7°. 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 14 inches of snow a winter
Snow, measured at Lexington 3e, MO, falls mostly in January. Precipitation (rain plus melted snow) adds up to 41 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 88 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Henrietta
84% of the work is heating. Months averaging under 55° run from November 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 Richmond 3s, MO.
Living with Henrietta’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
180 frost-free days in zone 6a. The last frost comes by Apr 19 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 18.
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 Henrietta from natural hazards, river flooding is the largest share (57%); heat waves, cold waves, winter storms and ice storms together are 21%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Henrietta and similar climates
TownRatings has no climate map of the towns around Henrietta yet.
Climates most like Henrietta’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 |
|---|---|---|---|---|
| Henrietta, MO | 20° | 88° | 41" | 14" |
| Jerseyville, IL | 21° | 87° | 41" | 13" |
| Terre Haute, IN | 21° | 87° | 43" | 15" |
| Hamilton, OH | 22° | 87° | 43" | 9.7" |
| Strasburg, VA | 23° | 87° | 39" | 21" |
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 Henrietta averaged 0.9° warmer than the 1900s. The biggest change is in March (+2.3°).
A smaller shift than in 82% 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 Henrietta compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Henrietta’s place among Missouri’s.
Henrietta weather by month
Highs, lows and precipitation from NOAA’s grid at Henrietta’s center; snow, wet days and snow on the ground from Lexington 3e, MO. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 38° | 20° | 1.3" | 4.7" | 6 | 7 | 22° – 39° |
| February | 44° | 24° | 1.7" | 3.2" | 5 | 3 | 24° – 43° |
| March | 55° | 33° | 2.7" | 0.8" | 7 | 1 | 37° – 58° |
| April | 66° | 43° | 4.1" | 0.2" | 10 | 0 | 46° – 60° |
| May | 75° | 54° | 5.2" | 0.0" | 11 | 0 | 59° – 73° |
| June | 84° | 64° | 5.1" | 0.0" | 9 | 0 | 70° – 78° |
| July | 88° | 67° | 4.9" | 0.0" | 8 | 0 | 73° – 84° |
| August | 87° | 65° | 4.3" | 0.0" | 7 | 0 | 70° – 81° |
| September | 80° | 56° | 4.2" | 0.0" | 7 | 0 | 62° – 74° |
| October | 68° | 44° | 3.2" | 0.0" | 7 | 0 | 50° – 61° |
| November | 54° | 34° | 2.3" | 0.8" | 6 | 0 | 36° – 52° |
| December | 42° | 24° | 1.8" | 4.1" | 6 | 5 | 19° – 40° |
| Year | 65° | 44° | 40.7" | 13.8" | 88 | 17 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 19° to 40°. June is the most reliable, staying within 8°.
Where Henrietta’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 Henrietta’s center.
- Snow: Lexington 3e, MO.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Richmond 3s, MO, 1.7 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 Henrietta’s climate
What is the weather like in Henrietta?
A typical July afternoon reaches 88°, a January night drops to 20°, and about 14 inches of snow falls in a normal winter. Colder January nights than 60% of U.S. towns; hotter July afternoons than 69% of U.S. towns.
How cold does it get in Henrietta in winter?
January nights average 20°. About 131 nights a year reach 32° or below and 7 reach 0° or below. In the coldest January of the last 30 years the month averaged 22°.
How much snow does Henrietta get?
About 14 inches in a normal winter at Lexington 3e, MO, most of it in January, with snow on the ground about 17 days a year.
How hot does it get in Henrietta?
July, with a typical high of 88° and a low of 67°. About 34 days a year reach 90° and 1 reach 100° (Richmond 3s, MO).
When is the first and last frost in Henrietta?
In half of years the last spring frost (32°) comes by April 19 and the first fall frost by October 18, about 180 frost-free days, at Richmond 3s, MO.
What growing zone is Henrietta in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −7°.
What is the best time of year to visit Henrietta?
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 Henrietta getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 82% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Henrietta.
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.