Vichy Rolla National Airport, Missouri climate: Climate normals at a NOAA weather station
Vichy Rolla National Airport's normal year runs from 22°F January nights to 88°F July afternoons, with 43.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.1°C, January lows of −5°C, July highs of 31°C, 1,094 mm of precipitation a year.
- NOAA stationVichy Rolla National Airport
- Station IDUSW00013997
- Location38.13°N 91.77°W
- Elevation1,127 ft (344 m)
On October 23, the normal high in Vichy Rolla National Airport is 65°F and the normal low 44°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Vichy Rolla National Airport.
- Jan 41° 22°
- Feb 46° 26°
- Mar 56° 35°
- Apr 67° 45°
- May 75° 54°
- Jun 83° 63°
- Jul 88° 67°
- Aug 87° 66°
- Sep 79° 58°
- Oct 68° 46°
- Nov 55° 35°
- Dec 44° 27°
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 Vichy Rolla National Airport each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 22°F. The most precipitation falls in May (5.35 in), the least in February (2.06 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 41°F | 22°F | 31.6°F | 2.22 | 8 | <1 | 25 | 9 h 50 min |
| February | 46°F | 26°F | 36.1°F | 2.06 | 8 | <1 | 21 | 10 h 50 min |
| March | 56°F | 35°F | 45.6°F | 3.40 | 11 | <1 | 13 | 11 h 50 min |
| April | 67°F | 45°F | 55.8°F | 4.71 | 11 | <1 | 3 | 13 h 10 min |
| May | 75°F | 54°F | 64.7°F | 5.35 | 13 | 1 | <1 | 14 h 10 min |
| June | 83°F | 63°F | 73.1°F | 4.46 | 11 | 4 | <1 | 14 h 50 min |
| July | 88°F | 67°F | 77.4°F | 4.43 | 9 | 13 | <1 | 14 h 30 min |
| August | 87°F | 66°F | 76.3°F | 3.66 | 9 | 11 | <1 | 13 h 40 min |
| September | 79°F | 58°F | 68.3°F | 3.81 | 8 | 3 | <1 | 12 h 30 min |
| October | 68°F | 46°F | 57.1°F | 3.21 | 9 | <1 | 2 | 11 h 20 min |
| November | 55°F | 35°F | 45.1°F | 3.45 | 8 | <1 | 13 | 10 h 10 min |
| December | 44°F | 27°F | 35.4°F | 2.31 | 7 | <1 | 23 | 9 h 30 min |
| Year (annual) | 66°F | 45°F | 55.5°F | 43.07 | 111 | 33 | 100 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 5°C | −5°C | −0.2°C | 56 mm |
| February | 8°C | −3°C | 2.3°C | 52 mm |
| March | 13°C | 2°C | 7.6°C | 86 mm |
| April | 19°C | 7°C | 13.2°C | 120 mm |
| May | 24°C | 12°C | 18.2°C | 136 mm |
| June | 28°C | 17°C | 22.8°C | 113 mm |
| July | 31°C | 19°C | 25.2°C | 113 mm |
| August | 31°C | 19°C | 24.6°C | 93 mm |
| September | 26°C | 14°C | 20.2°C | 97 mm |
| October | 20°C | 8°C | 13.9°C | 82 mm |
| November | 13°C | 2°C | 7.3°C | 88 mm |
| December | 7°C | −3°C | 1.9°C | 59 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Rolla (12 miles away), gets 17 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013997; 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 Vichy Rolla National Airport?
Normal highs sit between 65°F and 85°F in April, May, June, September and October. Of those, September has the fewest days with rain (8).
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 USW00013997.
When is the last frost at Vichy Rolla National Airport?
In Vichy Rolla National Airport, the last spring frost (32°F) comes after April 12 in half of years and after April 30 in one year in ten; the first autumn frost comes before October 25 in half of years and before October 11 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 121 year in 10 after April 30; 9 in 10 after March 26
- First autumn frost, half of years before
- October 251 year in 10 before October 11; 9 in 10 before November 5
NOAA puts the median frost-free season at 194 days, and the season without a hard freeze (28°F) at 216 days.
A hard freeze (28°F) comes after March 31 in half of springs and before November 2 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Vichy Rolla National Airport in zone 6b in ZIP code 65580, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 6b: the coldest night of a typical year reaches −3°F (28 complete years).
Frost dates for every NOAA station in Missouri · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00013997; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Vichy Rolla National Airport?
In a normal year in Vichy Rolla National Airport, 33 days a year reach 90°F (2 of them 100°F or more), 100 nights fall to 32°F or colder and 111 days bring measurable precipitation.
- Days at 90°F or more
- 33a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 100a normal year
- Days that stay below freezing
- 21high of 32°F or less
- Days with 0.01 inch of precipitation
- 111a normal year
The highest temperature in this station's record (since 1897) is 113°F, on July 18, 1954; the lowest is −29°F, on February 12, 1899.
The wettest calendar year on that record is 1993, with 59.84 in; the snowiest season is 1977–78, with 35.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00013997; records: ACIS (NOAA Regional Climate Centers), station USW00013997. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Vichy Rolla National Airport?
Over a year 75% of the sunlight that would reach the ground under clear skies gets through the clouds at Vichy Rolla National Airport, 4.2 kWh per square metre a day. July is the sunniest month (83%) and February the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 67% | 2.2 |
| February | 66% | 2.9 |
| March | 67% | 3.8 |
| April | 72% | 5.0 |
| May | 73% | 5.7 |
| June | 81% | 6.5 |
| July | 83% | 6.4 |
| August | 81% | 5.6 |
| September | 81% | 4.8 |
| October | 75% | 3.4 |
| November | 72% | 2.4 |
| December | 67% | 1.9 |
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 Vichy Rolla National Airport record?
A normal year at Vichy Rolla National Airport brings 4,721 heating degree days, 12% fewer than the median U.S. place (5,373), and 1,307 cooling degree days, 44% more than the median (908). Six months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,042 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,035 | 0 |
| February | 810 | 0 |
| March | 606 | 5 |
| April | 300 | 24 |
| May | 107 | 96 |
| June | 11 | 254 |
| July | 1 | 386 |
| August | 2 | 352 |
| September | 56 | 155 |
| October | 277 | 32 |
| November | 601 | 3 |
| December | 916 | 0 |
| Year (annual) | 4,721 | 1,307 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00013997. 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 Vichy Rolla National Airport been warmer than normal?
2025 averaged 56.7°F, 1.2°F above the 1991-2020 normal of 55.5°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 56.6°F | +1.1°F | 35.68 |
| 2023 | 57.7°F | +2.2°F | 28.22 |
| 2024 | 58.2°F | +2.7°F | 44.67 |
| 2025 | 56.7°F | +1.2°F | 32.01 |
Over 66 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 3.2°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00013997; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Vichy Rolla National Airport's climate compare?
Vichy Rolla National Airport is warmer than 75 of the 134 places with their own NOAA record in Missouri, and wetter than 56. Across the 7,247 U.S. stations with normals, its annual mean of 55.5°F is warmer than 62%.
In the Köppen classification computed from these normals, Vichy Rolla National Airport is Dfa: continental, 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 Vichy Rolla National Airport share this climate record?
Belle has no NOAA station with 1991-2020 normals of its 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.
- Belle, MO1,389 people · 11 mi N
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 Vichy Rolla National Airport's climate
What is the coldest month at Vichy Rolla National Airport?
January, with a normal high of 41°F and a normal low of 22°F. The warmest is July (88°F by day, 67°F at night).
Does it snow at Vichy Rolla National Airport?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Rolla (12 miles away), records 17 inches of snow in a normal year.
What is the rainiest month at Vichy Rolla National Airport?
May, with 5.35 in of precipitation in a normal year; the driest is February with 2.06 in.
What plant hardiness zone is Vichy Rolla National Airport in?
The USDA's 2023 map puts Vichy Rolla National Airport in zone 6b in ZIP code 65580, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −3°F (28 years, 1991-2020): zone 6b.
How late can frost come at Vichy Rolla National Airport?
In half of years the last 32°F night comes after April 12; in one year in ten it comes after April 30. Waiting until April 30 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Rolla, MO12 miles from this station, 56.3°F a year
- Vienna, MO12 miles from this station, 57.6°F a year
- Freedom, MO23 miles from this station, 54.8°F a year
- Steelville, MO24 miles from this station, 53.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made