Photo: Drowzy at English Wikipedia · Public domainPiedmont’s winters are milder than most of the U.S.; July afternoons average 90°
A typical July afternoon reaches 90°, a January night drops to 24°.
A year in Piedmont at a glance
Each month’s typical high and low, and what it brings.
What stands out about Piedmont’s climate
Compared with towns across the U.S., with Piedmont’s place in Missouri beside it.
What a year in Piedmont feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 199 frost-free days a year
In half of years the last 32° night comes by April 9 and the first by October 26. Frost and day counts come from NOAA’s station at Clearwater Dam, MO, 5 miles from the town’s center, 140 ft higher.
The 2023 USDA map puts Piedmont’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 1°. 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 48 inches of rain a year
May is the wettest month and January the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Piedmont
76% 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 Clearwater Dam, MO.
Living with Piedmont’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
199 frost-free days in zone 7a. The last frost comes by Apr 9 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 26.
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 Piedmont from natural hazards, river flooding is the largest share (54%); heat waves, cold waves, winter storms and ice storms together are 24%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Piedmont and similar climates
TownRatings has no climate map of the towns around Piedmont 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 Piedmont averaged 0.6° warmer than the 1900s. The biggest change is in February (+1.6°).
A smaller shift than in 95% 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 Piedmont compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Piedmont’s place among Missouri’s.
Piedmont weather by month
Highs, lows and precipitation from NOAA’s grid at Piedmont’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 44° | 24° | 3.2" | 27° – 42° |
| February | 50° | 27° | 3.2" | 28° – 48° |
| March | 59° | 35° | 4.4" | 40° – 59° |
| April | 70° | 44° | 5.3" | 50° – 64° |
| May | 78° | 54° | 5.5" | 61° – 73° |
| June | 86° | 62° | 3.8" | 69° – 79° |
| July | 90° | 66° | 4.0" | 73° – 83° |
| August | 88° | 64° | 3.7" | 71° – 83° |
| September | 81° | 57° | 3.6" | 65° – 76° |
| October | 71° | 44° | 3.4" | 54° – 63° |
| November | 58° | 35° | 4.6" | 39° – 51° |
| December | 47° | 27° | 3.4" | 24° – 44° |
| Year | 69° | 45° | 48.0" |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 24° to 44°. June is the most reliable, staying within 10°.
Where Piedmont’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 Piedmont’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Clearwater Dam, MO, 5 miles from the town’s center, 140 ft higher; 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 Piedmont’s climate
What is the weather like in Piedmont?
A typical July afternoon reaches 90°, a January night drops to 24°. Milder January nights than 59% of U.S. towns; hotter July afternoons than 75% of U.S. towns.
How cold does it get in Piedmont in winter?
January nights average 24°. About 109 nights a year reach 32° or below and 2 reach 0° or below. In the coldest January of the last 30 years the month averaged 27°.
How hot does it get in Piedmont?
July, with a typical high of 90° and a low of 66°. About 50 days a year reach 90° and 3 reach 100° (Clearwater Dam, MO).
When is the first and last frost in Piedmont?
In half of years the last spring frost (32°) comes by April 9 and the first fall frost by October 26, about 199 frost-free days, at Clearwater Dam, MO.
What growing zone is Piedmont in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 1°.
What is the best time of year to visit Piedmont?
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 Piedmont getting warmer?
Yes: 1991–2020 averaged 0.6° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 95% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Piedmont.
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.