Diamond, MO Climate: Temperature & Rain by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Diamond's primary NOAA station, DIAMOND 2W.
The climate verdict for Diamond
Water is the standout signal in Diamond, Missouri: 46.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 57°F. It scores 80/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 76% of them.
- 57°F
- average temperature, NOAA 1991-2020 normal
- 80/100
- comfort score, above 76% of station-mapped location scores
- 46.9"
- yearly precipitation total
- 187 days
- frost-free days per growing season
Diamond: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00232240 · Diamond, MO 57°F mean · 46.9" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 57°F
- RANK-UPPER #4,528
- PHOTO-FINISH ≈ JT Myers Locks…
- PRCP-MID 46.9"
- SWING-MID 44°F
- COMF-TOP 80/100
- LOAD-HEAT 4,346 HDD
- STN-1 USC00232240
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: JT Myers Locks & Dam, IN ( -0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every MO station list.
- Diamond (this station) 57°F
- Cold JT Myers Locks…, IN 57°F
- Hot Stevensville, MD 57°F
- Near Wappapello Dam, MO 57°F
- Near Dalhart, TX 57°F
Climate Living Index · Diamond
Diamond: 59/100 · grade C
Diamond publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Diamond, not an official NOAA rating. Rankings still use Comfort Score 80/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Annual temperature balance | 56.9°F · 10.6° from 67.5°F | 66/100 · C |
| Precipitation balance | 46.9 in · 11.9 from 35 in | 58/100 · C |
| Frost-free season | 187 days/year | 55/100 · C |
| Normal heat + freeze calendar | 139 calendar days | 53/100 · D |
Diamond · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Diamond is a temperate Köppen climate: Cfa
Coldest-month mean 34.3°F and warmest-month mean 78.4°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 78.4°F
- Coldest month
- 34.3°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Diamond sits across the climate record
Three NOAA fields for Diamond's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 66th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 27% wettest
- Diamond's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 54th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Diamond compares across U.S. station-mapped locations
Diamond's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
80 Top 24% score exceeds 76% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). This entry sits in this band.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 46°F (8°C) | 23°F (-5°C) | 34°F (1°C) | 1.9" | 25.5 | 0.0 |
| February | 51°F (10°C) | 26°F (-3°C) | 38°F (4°C) | 2.2" | 21.2 | 0.0 |
| March | 60°F (15°C) | 35°F (2°C) | 47°F (8°C) | 3.5" | 13.4 | 0.0 |
| April | 69°F (20°C) | 44°F (6°C) | 56°F (13°C) | 5.2" | 4.3 | 0.1 |
| May | 76°F (25°C) | 54°F (12°C) | 65°F (18°C) | 6.7" | 0.1 | 0.6 |
| June | 85°F (30°C) | 63°F (17°C) | 74°F (23°C) | 5.5" | 0.0 | 6.0 |
| July | 90°F (32°C) | 67°F (19°C) | 78°F (26°C) | 3.8" | 0.0 | 15.9 |
| August | 90°F (32°C) | 65°F (18°C) | 77°F (25°C) | 3.5" | 0.0 | 16.7 |
| September | 83°F (28°C) | 57°F (14°C) | 70°F (21°C) | 4.5" | 0.1 | 6.0 |
| October | 72°F (22°C) | 45°F (7°C) | 58°F (15°C) | 3.9" | 2.9 | 0.1 |
| November | 59°F (15°C) | 35°F (2°C) | 47°F (8°C) | 3.6" | 13.1 | 0.0 |
| December | 49°F (9°C) | 26°F (-3°C) | 38°F (3°C) | 2.5" | 23.2 | 0.0 |
The year, day by day
Diamond works both ends of the calendar. Normal highs climb to 91°F by August 2 and hold at or above 90°F on 35 dates, then normal lows drop to freezing or below on 104 dates, bottoming at 22°F around January 15.
When the heat sits
Normal highs reach 90°F from July 16 through August 19, covering 35 dates. The broader mild season, normal highs of 70°F or more, runs April 20 to October 20.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
The freezing stretch
The normal low stays at or below 32°F into March 7, then returns to freezing around November 25, covering 104 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is May 7, when 31% of years recorded at least a hundredth of an inch. The driest is January 17 at 13%. Summed across the calendar, that is about 81 wet dates a year.
The widest day
October 18 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Diamond.
Monthly Precipitation
Average monthly rainfall
3.8 days with precipitation
5.0 days with precipitation
7.3 days with precipitation
8.5 days with precipitation
9.4 days with precipitation
8.4 days with precipitation
7.1 days with precipitation
6.3 days with precipitation
6.9 days with precipitation
6.4 days with precipitation
6.6 days with precipitation
4.8 days with precipitation
Diamond spreads its precipitation across the year
Neither half of the year dominates here: June through August take 27% of the annual total and December through February 14%, with neither reaching the 35% that would mark a distinct wet season. Diamond has no dry season to plan around, though it does carry a 44.1°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 6.7" and January 1.9". The three wettest months together take 37% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Diamond, it arrives in quantity
46.9" of precipitation falls across only about 80 wet days here, averaging 0.58 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 80 a year, 22% of all days
- Average depth per wet day
- 0.58 inches
- Most wet days
- May, about 9
- Fewest wet days
- January, about 4
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
October 22
50% probability date
Last Spring Freeze
April 18
50% probability date
Growing Season
187 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,346
Higher = more heating needed
Cooling Degree Days
1,440
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MO closest to Diamond on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (57°F here).
- Ashland, KS 57°F · 0.0°F off
- Beaver Dam, KY 57°F · 0.0°F off
- Benton, KY 57°F · 0.0°F off
- Clearlake, CA 57°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (46.9" here), excluding temperature-peer places.
- Connellsville, PA 46.9" · 0.0" off
- Falls Village, CT 46.9" · 0.0" off
- Grundy, VA 46.9" · 0.0" off
- Clarion, PA 46.9" · 0.0" off
Data-derived climate profile
How Diamond's climate pattern fits together
heating led · wet · mid swing
Diamond's energy balance leans toward cold weather: 4,346 annual heating degree days against 1,440 for cooling. Its 44.1°F seasonal range still makes the monthly rows more useful than the annual average alone.
Diamond's frost-free season lasts about 187 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Diamond's middle-range seasonal profile. The measured spread is 44.1°F. The annual average is 57°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Diamond carries 46.9 inches of precipitation in a normal year, inside PlainClimate's wet range. Snowfall is not added to the interpretation because its annual value is missing. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Diamond's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Diamond, not an official NOAA class or a year-ahead forecast.
Questions about Diamond's climate
How much rain does Diamond get? ▼
How many days above 90°F does Diamond get? ▼
How much energy does heating and cooling require in Diamond? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Diamond's primary station: DIAMOND 2W (USC00232240). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 2919432). Match rule for Diamond: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Diamond comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.