Diamond, Missouri climate: Normal weather by month, frost dates and records
Diamond's normal year runs from 23°F January nights to 90°F July afternoons, with 46.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 13.8°C, January lows of −5°C, July highs of 32°C, 1,190 mm of precipitation a year.
- NOAA stationDiamond (2 mi W)
- Station IDUSC00232240
- Location36.99°N 94.36°W
- Elevation1,070 ft (326 m)
- Population890
On October 22, the normal high in Diamond is 69°F and the normal low 42°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Diamond.
- Jan 46° 23°
- Feb 51° 26°
- Mar 60° 35°
- Apr 69° 44°
- May 76° 54°
- Jun 85° 63°
- Jul 90° 67°
- Aug 90° 65°
- Sep 83° 57°
- Oct 72° 45°
- Nov 59° 35°
- Dec 49° 26°
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 Diamond each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 23°F. The most precipitation falls in May (6.71 in), the least in January (1.91 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 46°F | 23°F | 34.3°F | 1.91 | 4 | <1 | 26 | 9 h 50 min |
| February | 51°F | 26°F | 38.4°F | 2.24 | 5 | <1 | 21 | 10 h 50 min |
| March | 60°F | 35°F | 47.1°F | 3.54 | 7 | <1 | 13 | 11 h 50 min |
| April | 69°F | 44°F | 56.2°F | 5.24 | 9 | <1 | 4 | 13 h 10 min |
| May | 76°F | 54°F | 64.9°F | 6.71 | 9 | 1 | <1 | 14 h 10 min |
| June | 85°F | 63°F | 74.0°F | 5.49 | 8 | 6 | <1 | 14 h 40 min |
| July | 90°F | 67°F | 78.4°F | 3.80 | 7 | 16 | <1 | 14 h 30 min |
| August | 90°F | 65°F | 77.4°F | 3.48 | 6 | 17 | <1 | 13 h 40 min |
| September | 83°F | 57°F | 69.9°F | 4.48 | 7 | 6 | <1 | 12 h 30 min |
| October | 72°F | 45°F | 58.2°F | 3.89 | 6 | <1 | 3 | 11 h 20 min |
| November | 59°F | 35°F | 46.9°F | 3.58 | 7 | <1 | 13 | 10 h 10 min |
| December | 49°F | 26°F | 37.6°F | 2.51 | 5 | <1 | 23 | 9 h 40 min |
| Year (annual) | 69°F | 45°F | 56.9°F | 46.87 | 81 | 46 | 104 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 8°C | −5°C | 1.3°C | 49 mm |
| February | 10°C | −3°C | 3.6°C | 57 mm |
| March | 15°C | 2°C | 8.4°C | 90 mm |
| April | 20°C | 6°C | 13.4°C | 133 mm |
| May | 25°C | 12°C | 18.3°C | 170 mm |
| June | 30°C | 17°C | 23.3°C | 139 mm |
| July | 32°C | 19°C | 25.8°C | 97 mm |
| August | 32°C | 18°C | 25.2°C | 88 mm |
| September | 28°C | 14°C | 21.1°C | 114 mm |
| October | 22°C | 7°C | 14.6°C | 99 mm |
| November | 15°C | 2°C | 8.3°C | 91 mm |
| December | 9°C | −3°C | 3.1°C | 64 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Neosho (8 miles away), gets 8 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00232240; 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 Diamond?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October has the fewest days with rain (6).
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 USC00232240.
When is the last frost in Diamond?
In Diamond, the last spring frost (32°F) comes after April 18 in half of years and after May 3 in one year in ten; the first autumn frost comes before October 22 in half of years and before October 7 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 181 year in 10 after May 3; 9 in 10 after April 2
- First autumn frost, half of years before
- October 221 year in 10 before October 7; 9 in 10 before November 2
NOAA puts the median frost-free season at 184 days, and the season without a hard freeze (28°F) at 207 days.
A hard freeze (28°F) comes after April 6 in half of springs and before October 30 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Diamond in zone 7a in ZIP code 64840, 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 USC00232240; 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 Diamond?
In a normal year in Diamond, 46 days a year reach 90°F (3 of them 100°F or more), 104 nights fall to 32°F or colder and 81 days bring measurable precipitation.
- Days at 90°F or more
- 46a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 104a normal year
- Days that stay below freezing
- 12high of 32°F or less
- Days with 0.01 inch of precipitation
- 81a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00232240.
How sunny is Diamond?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Diamond, 4.4 kWh per square metre a day. July is the sunniest month (84%) and February the cloudiest (67%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 2.5 |
| February | 67% | 3.1 |
| March | 69% | 4.1 |
| April | 72% | 5.2 |
| May | 73% | 5.8 |
| June | 82% | 6.7 |
| July | 84% | 6.5 |
| August | 82% | 5.8 |
| September | 82% | 5.0 |
| October | 77% | 3.7 |
| November | 75% | 2.7 |
| December | 69% | 2.1 |
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 Diamond need?
A normal year in Diamond brings 4,346 heating degree days, 19% fewer than the median U.S. place (5,373), and 1,440 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 4,262 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 953 | 0 |
| February | 745 | 1 |
| March | 561 | 6 |
| April | 292 | 28 |
| May | 99 | 96 |
| June | 7 | 277 |
| July | 1 | 416 |
| August | 2 | 388 |
| September | 43 | 188 |
| October | 248 | 37 |
| November | 546 | 3 |
| December | 849 | 0 |
| Year (annual) | 4,346 | 1,440 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00232240. 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.
Has Diamond been warmer than normal lately?
2025 averaged 57.9°F, 1.0°F above the 1991-2020 normal of 56.9°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.1°F | +0.2°F | 54.00 |
| 2022 | 56.6°F | −0.3°F | 44.90 |
| 2023 | 58.2°F | +1.3°F | 40.18 |
| 2024 | 59.1°F | +2.2°F | 36.18 |
| 2025 | 57.9°F | +1.0°F | – |
Source: observed years: ACIS, station USC00232240. A year counts only with all twelve months complete.
How does Diamond's climate compare?
Diamond is warmer than 108 of the other 133 places with their own NOAA record in Missouri, and wetter than 98. Across the 7,247 U.S. stations with normals, its annual mean of 56.9°F is warmer than 66%.
In the Köppen classification computed from these normals, Diamond 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 Diamond 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.
- Saginaw, MO327 people · 7 mi W
- Shoal Creek Estates, MO109 people · 8 mi W
- Ritchey, MO68 people · 10 mi E
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 Diamond's climate
What is the coldest month in Diamond?
January, with a normal high of 46°F and a normal low of 23°F. The warmest is July (90°F by day, 67°F at night).
Does it snow in Diamond?
Yes. NOAA publishes no 1991-2020 snowfall normal for Diamond's NOAA station; the nearest record that keeps one, Neosho (8 miles away), records 8 inches of snow in a normal year.
What is the rainiest month in Diamond?
May, with 6.71 in of precipitation in a normal year; the driest is January with 1.91 in.
What plant hardiness zone is Diamond in?
The USDA's 2023 map puts Diamond in zone 7a in ZIP code 64840, the nearest ZIP area.
How late can frost come in Diamond?
In half of years the last 32°F night comes after April 18; in one year in ten it comes after May 3. Waiting until May 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Missouri climateThe statewide normals and every place in the state
- Neosho, MO8 miles from this station, 58.6°F a year
- Carthage, MO14 miles from this station, 58.3°F a year
- Joplin, MO14 miles from this station, 58.1°F a year
- Monett, MO24 miles from this station, 56.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made