Tarkio, Missouri climate: Normal weather by month, frost dates and records
Tarkio's normal year runs from 15°F January nights to 85°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.6°C, January lows of −9°C, July highs of 29°C.
- NOAA stationTarkio
- Station IDUSW00014945
- Location40.43°N 95.39°W
- Elevation1,045 ft (319 m)
- From the centerunder 1 mile
- Population1,470
On October 23, the normal high in Tarkio is 62°F and the normal low 38°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Tarkio.
- Jan 33° 15°
- Feb 38° 18°
- Mar 52° 29°
- Apr 63° 39°
- May 72° 51°
- Jun 82° 62°
- Jul 85° 66°
- Aug 84° 63°
- Sep 78° 54°
- Oct 65° 40°
- Nov 50° 30°
- Dec 37° 20°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Tarkio each month?
July is the warmest month, with normal highs of 85°F; January the coldest, with normal lows of 15°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 33°F | 15°F | 24.2°F | – | <1 | 29 | 9 h 30 min |
| February | 38°F | 18°F | 28.0°F | – | <1 | 24 | 10 h 40 min |
| March | 52°F | 29°F | 40.6°F | – | <1 | 21 | 11 h 50 min |
| April | 63°F | 39°F | 51.2°F | – | <1 | 7 | 13 h 10 min |
| May | 72°F | 51°F | 61.6°F | – | 1 | <1 | 14 h 20 min |
| June | 82°F | 62°F | 71.8°F | – | 4 | <1 | 15 h |
| July | 85°F | 66°F | 75.3°F | – | 9 | <1 | 14 h 50 min |
| August | 84°F | 63°F | 73.5°F | – | 8 | <1 | 13 h 50 min |
| September | 78°F | 54°F | 65.7°F | – | 3 | 1 | 12 h 30 min |
| October | 65°F | 40°F | 52.9°F | – | 1 | 8 | 11 h 10 min |
| November | 50°F | 30°F | 39.9°F | – | <1 | 19 | 10 h |
| December | 37°F | 20°F | 28.2°F | – | <1 | 29 | 9 h 20 min |
| Year (annual) | 62°F | 41°F | 51.1°F | – | 26 | 138 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 1°C | −9°C | −4.3°C |
| February | 3°C | −8°C | −2.2°C |
| March | 11°C | −2°C | 4.8°C |
| April | 17°C | 4°C | 10.7°C |
| May | 22°C | 11°C | 16.4°C |
| June | 28°C | 17°C | 22.1°C |
| July | 29°C | 19°C | 24.1°C |
| August | 29°C | 17°C | 23.1°C |
| September | 25°C | 12°C | 18.7°C |
| October | 19°C | 5°C | 11.6°C |
| November | 10°C | −1°C | 4.4°C |
| December | 3°C | −7°C | −2.1°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Auburn (19 miles away), gets 30 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00014945; 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.
When is the best weather to visit Tarkio?
Normal highs sit between 65°F and 85°F in May, June, July, August, 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 USW00014945.
When is the last frost in Tarkio?
In Tarkio, the last spring frost (32°F) comes after April 19 in half of years and after May 4 in one year in ten; the first autumn frost comes before October 15 in half of years and before October 1 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 191 year in 10 after May 4; 9 in 10 after April 6
- First autumn frost, half of years before
- October 151 year in 10 before October 1; 9 in 10 before October 27
NOAA puts the median frost-free season at 177 days, and the season without a hard freeze (28°F) at 198 days.
A hard freeze (28°F) comes after April 9 in half of springs and before October 25 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tarkio in zone 5b in ZIP code 64491, 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 USW00014945; 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 in Tarkio?
In a normal year in Tarkio, 26 days a year reach 90°F (1 of them 100°F or more) and 138 nights fall to 32°F or colder.
- Days at 90°F or more
- 26a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 138a normal year
- Days that stay below freezing
- 38high of 32°F or less
The highest temperature in this station's record (since 1912) is 113°F, on July 25, 1936; the lowest is −28°F, on January 4, 1947.
The wettest calendar year on that record is 1973, with 60.55 in; the snowiest season is 1959–60, with 66.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00014945; records: ACIS (NOAA Regional Climate Centers), station USW00014945. Records use complete months only; a month missing more than three days is left out.
How sunny is Tarkio?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Tarkio, 4.3 kWh per square metre a day. July is the sunniest month (84%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 72% | 2.2 |
| February | 74% | 3.1 |
| March | 70% | 3.9 |
| April | 71% | 5.0 |
| May | 73% | 5.8 |
| June | 80% | 6.5 |
| July | 84% | 6.6 |
| August | 82% | 5.7 |
| September | 81% | 4.7 |
| October | 76% | 3.3 |
| November | 75% | 2.4 |
| December | 70% | 1.8 |
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 much heating and cooling does Tarkio need?
A normal year in Tarkio brings 6,051 heating degree days, 13% more than the median U.S. place (5,373), and 1,009 cooling degree days, 11% more than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,402 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,266 | 0 |
| February | 1,037 | 0 |
| March | 758 | 1 |
| April | 423 | 7 |
| May | 164 | 59 |
| June | 16 | 220 |
| July | 2 | 321 |
| August | 6 | 271 |
| September | 91 | 112 |
| October | 395 | 19 |
| November | 753 | 0 |
| December | 1,141 | 0 |
| Year (annual) | 6,051 | 1,009 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00014945. 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.
How does Tarkio's climate compare?
Tarkio is warmer than 4 of the other 133 places with their own NOAA record in Missouri. Across the 7,247 U.S. stations with normals, its annual mean of 51.1°F is warmer than 45%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Tarkio share this climate record?
5 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.
- Fairfax, MO623 people · 7 mi S
- Coin, IA171 people · 17 mi NE
- Northboro, IA52 people · 13 mi NE
- Blanchard, IA29 people · 13 mi NE
- Barada, NE19 people · 18 mi SW
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 Tarkio's climate
What is the coldest month in Tarkio?
January, with a normal high of 33°F and a normal low of 15°F. The warmest is July (85°F by day, 66°F at night).
Does it snow in Tarkio?
Yes. NOAA publishes no 1991-2020 snowfall normal for Tarkio's NOAA station; the nearest record that keeps one, Auburn (19 miles away), records 30 inches of snow in a normal year.
What plant hardiness zone is Tarkio in?
The USDA's 2023 map puts Tarkio in zone 5b in ZIP code 64491, the nearest ZIP area.
How late can frost come in Tarkio?
In half of years the last 32°F night comes after April 19; in one year in ten it comes after May 4. Waiting until May 4 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Auburn, NE19 miles from this station, 52.4°F a year
- Shenandoah, IA24 miles from this station, 51.8°F a year
- Sidney, IA25 miles from this station, 50.7°F a year
- Falls City, NE27 miles from this station, 53.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made