Farnhamville has colder winter nights than 94% of U.S. towns
In July the day’s top temperature is typically 84°. June is the wettest month, January the driest. By precipitation alone, it ranks drier than 77% of U.S. towns. Garden chairs stay out from May to September, the months with highs of 71–84°.
A year in Farnhamville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Farnhamville’s climate
Compared with towns across the U.S., with Farnhamville’s place in Iowa beside it.
What a year in Farnhamville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 167 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by October 10. Frost and day counts come from NOAA’s station at Rockwell City, IA, 14 miles from the town’s center, at about the same height.
The 2023 USDA map puts Farnhamville’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −16°. 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 32 inches of snow a winter
Snow, measured at Rockwell City, IA, falls mostly in January, February and December. Precipitation (rain plus melted snow) adds up to 35 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 94 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Farnhamville
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 Rockwell City, IA.
Living with Farnhamville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
167 frost-free days in zone 5a. The last frost comes by Apr 26 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 10.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September.
Parks & trails →Of the yearly building losses FEMA expects in Farnhamville from natural hazards, drought is the largest share (36%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Farnhamville and similar climates
TownRatings has no climate map of the towns around Farnhamville yet.
Climates most like Farnhamville’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 |
|---|---|---|---|---|
| Farnhamville, IA | 10° | 84° | 35" | 32" |
| Prairie du Chien, WI | 10° | 83° | 37" | 34" |
| Winona, MN | 8° | 83° | 36" | 38" |
| Freeport, IL | 12° | 83° | 38" | 35" |
| Mount Pleasant, MI | 15° | 83° | 33" | 39" |
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 Farnhamville averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.3°).
A smaller shift than in 92% 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 Farnhamville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Farnhamville’s place among Iowa’s.
Farnhamville weather by month
Highs, lows and precipitation from NOAA’s grid at Farnhamville’s center; snow, wet days and snow on the ground from Rockwell City, IA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 27° | 10° | 0.9" | 7.4" | 5 | 23 | 8° – 32° |
| February | 32° | 14° | 1.1" | 7.6" | 5 | 20 | 13° – 34° |
| March | 46° | 26° | 2.0" | 4.9" | 7 | 10 | 29° – 51° |
| April | 60° | 37° | 3.7" | 1.9" | 9 | 1 | 39° – 55° |
| May | 71° | 48° | 4.9" | 0.0" | 12 | 0 | 54° – 67° |
| June | 81° | 59° | 5.3" | 0.0" | 11 | 0 | 67° – 74° |
| July | 84° | 63° | 4.1" | 0.0" | 9 | 0 | 68° – 79° |
| August | 81° | 60° | 4.3" | 0.0" | 9 | 0 | 66° – 76° |
| September | 75° | 51° | 3.1" | 0.0" | 8 | 0 | 57° – 68° |
| October | 63° | 39° | 2.5" | 0.6" | 8 | 0 | 44° – 56° |
| November | 46° | 27° | 1.6" | 2.4" | 5 | 4 | 26° – 48° |
| December | 33° | 16° | 1.3" | 7.3" | 5 | 15 | 9° – 31° |
| Year | 58° | 37° | 34.7" | 32.1" | 94 | 74 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 8° to 32°. June is the most reliable, staying within 7°.
Where Farnhamville’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 Farnhamville’s center.
- Snow: Rockwell City, IA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Rockwell City, IA, 14 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 Farnhamville’s climate
What is the weather like in Farnhamville?
A typical July afternoon reaches 84°, a January night drops to 10°, and about 32 inches of snow falls in a normal winter. Colder January nights than 94% of U.S. towns; cooler July afternoons than 63% of U.S. towns.
How cold does it get in Farnhamville in winter?
January nights average 10°. About 154 nights a year reach 32° or below and 22 reach 0° or below. In the coldest January of the last 30 years the month averaged 8°.
How much snow does Farnhamville get?
About 32 inches in a normal winter at Rockwell City, IA, most of it in January, February and December, with snow on the ground about 74 days a year.
How hot does it get in Farnhamville?
July, with a typical high of 84° and a low of 63°. About 13 days a year reach 90° (Rockwell City, IA).
When is the first and last frost in Farnhamville?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by October 10, about 167 frost-free days, at Rockwell City, IA.
What growing zone is Farnhamville in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −16°.
What is the best time of year to visit Farnhamville?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Farnhamville getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Farnhamville.
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.