Photo: Chris Flook · CC BY-SA 4.0Neither notably warm, cold, wet nor dry, Roann sits near the middle of U.S. towns
January nights here settle around 18°. Winter nights are cold: in January they are colder than in 68% of U.S. towns. Warming shows here too: 1.1° more than in 1901–2000, led by December. From May to June and August to October, highs of 64–82° make it easy to spend the day outdoors.
A year in Roann at a glance
Each month’s typical high and low, and what it brings.
What stands out about Roann’s climate
Compared with towns across the U.S., with Roann’s place in Indiana beside it.
What a year in Roann feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 174 frost-free days a year
In half of years the last 32° night comes by April 26 and the first by October 19. Frost and day counts come from NOAA’s station at N Manchester Wwtp, IN, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Roann’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 20 inches of snow a winter
Snow, measured at Wabash, IN, falls mostly in January. Precipitation (rain plus melted snow) adds up to 40 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 117 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Roann
89% 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 N Manchester Wwtp, IN.
Living with Roann’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
174 frost-free days in zone 6a. 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 19.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Roann from natural hazards, river flooding is the largest share (41%); heat waves, cold waves, winter storms and ice storms together are 11%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Roann and similar climates
TownRatings has no climate map of the towns around Roann yet.
Climates most like Roann’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 |
|---|---|---|---|---|
| Roann, IN | 18° | 84° | 40" | 20" |
| Dover, OH | 20° | 84° | 40" | 20" |
| Monticello, IL | 18° | 85° | 40" | 18" |
| New Brighton, PA | 21° | 84° | 41" | 20" |
| Burlington, IA | 16° | 86° | 38" | 22" |
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 Roann averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.3°).
A smaller shift than in 70% 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 Roann compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Roann’s place among Indiana’s.
Roann weather by month
Highs, lows and precipitation from NOAA’s grid at Roann’s center; snow, wet days and snow on the ground from Wabash, IN. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 33° | 18° | 2.5" | 7.3" | 9 | 16° – 38° |
| February | 37° | 21° | 2.1" | 4.8" | 8 | 17° – 40° |
| March | 49° | 30° | 2.6" | 2.4" | 10 | 30° – 54° |
| April | 62° | 39° | 3.8" | 0.4" | 11 | 43° – 56° |
| May | 73° | 50° | 4.3" | 0.0" | 12 | 54° – 68° |
| June | 81° | 60° | 4.8" | 0.0" | 12 | 65° – 74° |
| July | 84° | 63° | 4.2" | 0.0" | 10 | 68° – 79° |
| August | 82° | 61° | 4.0" | 0.0" | 9 | 67° – 78° |
| September | 77° | 53° | 3.1" | 0.0" | 9 | 60° – 69° |
| October | 64° | 43° | 3.1" | 0.0" | 9 | 50° – 60° |
| November | 50° | 33° | 3.0" | 1.0" | 10 | 34° – 49° |
| December | 38° | 24° | 2.5" | 3.6" | 9 | 16° – 41° |
| Year | 61° | 41° | 40.0" | 19.5" | 117 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 16° to 41°. June is the most reliable, staying within 8°.
Where Roann’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 Roann’s center.
- Snow: Wabash, IN.
- Frost, freezing nights, 90° and 100° days, heating and cooling: N Manchester Wwtp, IN, 10 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 Roann’s climate
What is the weather like in Roann?
A typical July afternoon reaches 84°, a January night drops to 18°, and about 20 inches of snow falls in a normal winter. Colder January nights than 68% of U.S. towns; cooler July afternoons than 58% of U.S. towns.
How cold does it get in Roann in winter?
January nights average 18°. About 134 nights a year reach 32° or below and 9 reach 0° or below. In the coldest January of the last 30 years the month averaged 16°.
How much snow does Roann get?
About 20 inches in a normal winter at Wabash, IN, most of it in January.
How hot does it get in Roann?
July, with a typical high of 84° and a low of 63°. About 12 days a year reach 90° (N Manchester Wwtp, IN).
When is the first and last frost in Roann?
In half of years the last spring frost (32°) comes by April 26 and the first fall frost by October 19, about 174 frost-free days, at N Manchester Wwtp, IN.
What growing zone is Roann 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 Roann?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Roann getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 70% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Roann.
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.