Wappapello Dam, Missouri climate: Climate normals at a NOAA weather station
Wappapello Dam's normal year runs from 24°F January nights to 88°F July afternoons, with 51.4 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.8°C, January lows of −4°C, July highs of 31°C, 1,306 mm of precipitation a year.
- NOAA stationWappapello Dam
- Station IDUSC00238700
- Location36.92°N 90.28°W
- Elevation410 ft (125 m)
On October 23, the normal high in Wappapello Dam is 67°F and the normal low 44°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Wappapello Dam.
- Jan 42° 24°
- Feb 47° 28°
- Mar 56° 37°
- Apr 68° 46°
- May 76° 57°
- Jun 85° 65°
- Jul 88° 69°
- Aug 87° 67°
- Sep 81° 60°
- Oct 69° 47°
- Nov 56° 36°
- Dec 45° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Wappapello Dam each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 24°F. The most precipitation falls in May (5.57 in), the least in February (3.53 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 42°F | 24°F | 33.3°F | 3.84 | – | <1 | 25 | 9 h 50 min |
| February | 47°F | 28°F | 37.4°F | 3.53 | – | <1 | 20 | 10 h 50 min |
| March | 56°F | 37°F | 46.4°F | 4.98 | – | <1 | 11 | 11 h 50 min |
| April | 68°F | 46°F | 56.8°F | 5.38 | – | <1 | 2 | 13 h 10 min |
| May | 76°F | 57°F | 66.2°F | 5.57 | – | 2 | <1 | 14 h 10 min |
| June | 85°F | 65°F | 74.9°F | 3.96 | – | 11 | <1 | 14 h 40 min |
| July | 88°F | 69°F | 78.4°F | 4.36 | – | 18 | <1 | 14 h 30 min |
| August | 87°F | 67°F | 77.2°F | 3.55 | – | 15 | <1 | 13 h 40 min |
| September | 81°F | 60°F | 70.1°F | 3.58 | – | 6 | <1 | 12 h 30 min |
| October | 69°F | 47°F | 58.2°F | 3.78 | – | <1 | 1 | 11 h 20 min |
| November | 56°F | 36°F | 46.1°F | 4.71 | – | <1 | 11 | 10 h 10 min |
| December | 45°F | 28°F | 36.6°F | 4.17 | – | <1 | 22 | 9 h 40 min |
| Year (annual) | 67°F | 47°F | 56.8°F | 51.41 | – | 53 | 92 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −4°C | 0.7°C | 98 mm |
| February | 8°C | −2°C | 3.0°C | 90 mm |
| March | 13°C | 3°C | 8.0°C | 126 mm |
| April | 20°C | 8°C | 13.8°C | 137 mm |
| May | 24°C | 14°C | 19.0°C | 141 mm |
| June | 29°C | 19°C | 23.8°C | 101 mm |
| July | 31°C | 21°C | 25.8°C | 111 mm |
| August | 31°C | 20°C | 25.1°C | 90 mm |
| September | 27°C | 15°C | 21.2°C | 91 mm |
| October | 21°C | 8°C | 14.6°C | 96 mm |
| November | 13°C | 2°C | 7.8°C | 120 mm |
| December | 7°C | −2°C | 2.6°C | 106 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Poplar Bluff station (13 miles away), gets 5 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00238700; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
Which months are mildest at Wappapello Dam?
Normal highs sit between 65°F and 85°F in April, May, June, September and October.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00238700.
When is the last frost at Wappapello Dam?
In Wappapello Dam, the last spring frost (32°F) comes after April 2 in half of years and after April 18 in one year in ten; the first autumn frost comes before November 2 in half of years and before October 21 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 21 year in 10 after April 18; 9 in 10 after March 16
- First autumn frost, half of years before
- November 21 year in 10 before October 21; 9 in 10 before November 18
NOAA puts the median frost-free season at 215 days, and the season without a hard freeze (28°F) at 238 days.
A hard freeze (28°F) comes after March 21 in half of springs and before November 14 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Wappapello Dam in zone 7a in ZIP code 63966, the nearest ZIP area.
Frost dates for every NOAA station in Missouri · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00238700; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get at Wappapello Dam?
In a normal year in Wappapello Dam, 53 days a year reach 90°F (3 of them 100°F or more) and 92 nights fall to 32°F or colder.
- Days at 90°F or more
- 53a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 92a normal year
- Days that stay below freezing
- 9high of 32°F or less
The highest temperature in this station's record (since 1939) is 112°F, on July 29, 1997; the lowest is −18°F, on January 8, 1942.
The wettest calendar year on that record is 1973, with 78.61 in; the snowiest season is 1969–70, with 33.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00238700; records: ACIS (NOAA Regional Climate Centers), station USC00238700. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Wappapello Dam?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Wappapello Dam, 4.4 kWh per square metre a day. July is the sunniest month (83%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.4 |
| February | 67% | 3.0 |
| March | 69% | 4.0 |
| April | 74% | 5.2 |
| May | 75% | 5.8 |
| June | 83% | 6.7 |
| July | 83% | 6.4 |
| August | 83% | 5.8 |
| September | 82% | 4.9 |
| October | 77% | 3.6 |
| November | 73% | 2.6 |
| December | 67% | 2.0 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How many heating and cooling degree days does Wappapello Dam record?
A normal year at Wappapello Dam brings 4,393 heating degree days, 18% fewer than the median U.S. place (5,373), and 1,441 cooling degree days, 59% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,250 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 983 | 0 |
| February | 772 | 0 |
| March | 579 | 2 |
| April | 265 | 19 |
| May | 73 | 110 |
| June | 4 | 302 |
| July | 0 | 417 |
| August | 0 | 379 |
| September | 31 | 182 |
| October | 238 | 28 |
| November | 570 | 1 |
| December | 879 | 0 |
| Year (annual) | 4,393 | 1,441 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00238700. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Have recent years at Wappapello Dam been warmer than normal?
Over 44 complete years from 1940 to 2017, the station's annual mean temperature rose at a fitted 0.8°F per century (+0.04°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Wappapello Dam's climate compare?
Wappapello Dam is warmer than 106 of the 134 places with their own NOAA record in Missouri, and wetter than 121. Across the 7,247 U.S. stations with normals, its annual mean of 56.8°F is warmer than 66%.
In the Köppen classification computed from these normals, Wappapello Dam is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Wappapello Dam share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Puxico, MO869 people · 7 mi E
- Greenville, MO439 people · 17 mi NW
- Williamsville, MO272 people · 15 mi W
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Wappapello Dam's climate
What is the coldest month at Wappapello Dam?
January, with a normal high of 42°F and a normal low of 24°F. The warmest is July (88°F by day, 69°F at night).
Does it snow at Wappapello Dam?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Poplar Bluff station (13 miles away), records 5 inches of snow in a normal year.
What is the rainiest month at Wappapello Dam?
May, with 5.57 in of precipitation in a normal year; the driest is February with 3.53 in.
What plant hardiness zone is Wappapello Dam in?
The USDA's 2023 map puts Wappapello Dam in zone 7a in ZIP code 63966, the nearest ZIP area.
How late can frost come at Wappapello Dam?
In half of years the last 32°F night comes after April 2; in one year in ten it comes after April 18. Waiting until April 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Poplar Bluff, MO11 miles from this station, 58.6°F a year
- Advance, MO24 miles from this station, 56.8°F a year
- Malden, MO28 miles from this station, 59.9°F a year
- Clearwater Dam, MO30 miles from this station, 56.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made