Photo: Chillin662 · CC BY-SA 3.0Precipitation in Lyon tops that of 93% of U.S. towns: 54 inches a year
The depth of winter brings overnight lows near 34°. The gap between a January night and a July afternoon is 58°. In July, afternoons here are warmer than in 83% of U.S. towns. Keep the boiler serviced for the months from December to February, which average under 50°.
A year in Lyon at a glance
Each month’s typical high and low, and what it brings.
What stands out about Lyon’s climate
Compared with towns across the U.S., with Lyon’s place in Mississippi beside it.
What a year in Lyon feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 243 frost-free days a year
In half of years the last 32° night comes by March 16 and the first by November 12. Frost and day counts come from NOAA’s station at Clarksdale, MS, 2.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Lyon’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 15°. 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 54 inches of rain a year
April is the wettest month and August the driest. Rain falls on about 90 days a year. Snow is rare: about 0.4" in a normal year at Lambert 1w, MS, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Lyon
59% 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 Clarksdale, MS.
Living with Lyon’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
243 frost-free days in zone 8a. The last frost comes by Mar 16 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 12.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November.
Parks & trails →Of the yearly building losses FEMA expects in Lyon from natural hazards, river flooding is the largest share (31%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Lyon and similar climates
TownRatings has no climate map of the towns around Lyon yet.
Climates most like Lyon’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 |
|---|---|---|---|---|
| Lyon, MS | 34° | 91° | 54" | 0.4" |
| Clanton, AL | 34° | 91° | 55" | 0.5" |
| Kinston, NC | 33° | 90° | 53" | 0.7" |
| Rome, GA | 32° | 90° | 52" | 0.4" |
| Magnolia, AR | 34° | 92° | 55" | 1.7" |
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 Lyon averaged 0.7° warmer than the 1900s. The biggest change is in February (+1.4°).
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 Lyon compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Lyon’s place among Mississippi’s.
Lyon weather by month
Highs, lows and precipitation from NOAA’s grid at Lyon’s center; snow, wet days and snow on the ground from Lambert 1w, MS. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 51° | 34° | 4.8" | 0.1" | 9 | 0 | 36° – 49° |
| February | 56° | 37° | 4.8" | 0.0" | 9 | 0 | 36° – 55° |
| March | 64° | 44° | 5.3" | 0.2" | 9 | 0 | 48° – 64° |
| April | 74° | 52° | 6.0" | 0.0" | 8 | 0 | 56° – 69° |
| May | 82° | 61° | 5.1" | 0.0" | 9 | 0 | 68° – 77° |
| June | 89° | 69° | 3.9" | 0.0" | 7 | 0 | 76° – 83° |
| July | 91° | 72° | 4.0" | 0.0" | 7 | 0 | 77° – 84° |
| August | 91° | 70° | 3.0" | 0.0" | 6 | 0 | 75° – 85° |
| September | 86° | 64° | 3.3" | 0.0" | 5 | 0 | 72° – 82° |
| October | 76° | 52° | 4.3" | 0.0" | 6 | 0 | 59° – 70° |
| November | 63° | 42° | 4.3" | 0.0" | 7 | 0 | 47° – 58° |
| December | 54° | 36° | 5.7" | 0.1" | 9 | 0 | 34° – 53° |
| Year | 73° | 53° | 54.4" | 0.4" | 90 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 34° to 53°. June is the most reliable, staying within 7°.
Where Lyon’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 Lyon’s center.
- Snow: Lambert 1w, MS.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Clarksdale, MS, 2.2 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 Lyon’s climate
What is the weather like in Lyon?
A typical July afternoon reaches 91°, a January night drops to 34°, and snow is almost unheard of. Milder January nights than 78% of U.S. towns; hotter July afternoons than 83% of U.S. towns.
How cold does it get in Lyon in winter?
January nights average 34°. About 51 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 36°.
How much snow does Lyon get?
About 0.4 inches in a normal winter at Lambert 1w, MS, so most winters see none.
How hot does it get in Lyon?
July, with a typical high of 91° and a low of 72°. About 67 days a year reach 90° and 1 reach 100° (Clarksdale, MS).
When is the first and last frost in Lyon?
In half of years the last spring frost (32°) comes by March 16 and the first fall frost by November 12, about 243 frost-free days, at Clarksdale, MS.
What growing zone is Lyon in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 15°.
What is the best time of year to visit Lyon?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Lyon 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 Lyon.
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.