Clyde Carter House · Photo: Spyder_Monkey · CC BY-SA 3.0Killen is among the wettest of U.S. towns: 57 inches of precipitation a year
The depth of winter brings overnight lows near 30°. Summer afternoons here are warmer than in 78% of U.S. towns. Compared with 1901–2000, the average now sits 0.7° higher. Seedlings are safe outdoors from about March 30, with the first autumn frost due around November 3.
A year in Killen at a glance
Each month’s typical high and low, and what it brings.
What stands out about Killen’s climate
Compared with towns across the U.S., with Killen’s place in Alabama beside it.
What a year in Killen feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 220 frost-free days a year
In half of years the last 32° night comes by March 30 and the first by November 3. Day counts come from NOAA’s station at Muscle Shoals 2 N, AL, 9 miles from the town’s center, at about the same height; frost dates and degree days from Muscle Shoals Wtp, AL, 10 miles away.
The 2023 USDA map puts Killen’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 11°. 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 57 inches of rain a year
December is the wettest month and September the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Killen
65% 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 Muscle Shoals Wtp, AL.
Living with Killen’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
220 frost-free days in zone 8a. The last frost comes by Mar 30 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 3.
Months with highs of 62–84° and lows of 40° or more: April, May and October. 0.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Killen from natural hazards, river flooding is the largest share (59%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Killen and similar climates
TownRatings has no climate map of the towns around Killen yet.
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 Killen averaged 0.7° warmer than the 1900s. The biggest change is in February (+1.7°).
A smaller shift than in 94% 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 Killen compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Killen’s place among Alabama’s.
Killen weather by month
Highs, lows and precipitation from NOAA’s grid at Killen’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 51° | 30° | 5.1" | 33° – 48° |
| February | 56° | 33° | 5.3" | 35° – 52° |
| March | 64° | 40° | 5.4" | 46° – 62° |
| April | 73° | 47° | 5.1" | 55° – 66° |
| May | 81° | 56° | 4.6" | 64° – 74° |
| June | 87° | 64° | 4.4" | 72° – 79° |
| July | 90° | 68° | 4.8" | 75° – 82° |
| August | 90° | 66° | 4.3" | 73° – 84° |
| September | 84° | 60° | 3.7" | 68° – 79° |
| October | 74° | 48° | 3.9" | 58° – 67° |
| November | 63° | 38° | 4.2" | 45° – 56° |
| December | 54° | 33° | 6.0" | 33° – 53° |
| Year | 72° | 49° | 57.0" |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 33° to 53°. June is the most reliable, staying within 7°.
Where Killen’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 Killen’s center.
- Frost dates, heating and cooling: Muscle Shoals Wtp, AL, 10 miles away.
- Freezing nights, 90° and 100° days: Muscle Shoals 2 N, AL, 9 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 Killen’s climate
What is the weather like in Killen?
A typical July afternoon reaches 90°, a January night drops to 30°. Milder January nights than 73% of U.S. towns; hotter July afternoons than 78% of U.S. towns.
How cold does it get in Killen in winter?
January nights average 30°. About 62 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 33°.
How hot does it get in Killen?
July, with a typical high of 90° and a low of 68°. About 55 days a year reach 90° and 2 reach 100° (Muscle Shoals Wtp, AL).
When is the first and last frost in Killen?
In half of years the last spring frost (32°) comes by March 30 and the first fall frost by November 3, about 220 frost-free days, at Muscle Shoals Wtp, AL.
What growing zone is Killen in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 11°.
What is the best time of year to visit Killen?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Killen getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 94% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Killen.
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.