Round Spring, MO Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Round Spring's primary NOAA station, ROUND SPRING 2SW.
The climate verdict for Round Spring
Water is the standout signal in Round Spring, Missouri: 49.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 55°F. It scores 74/100 for climate comfort (good), putting it in the top third of station-mapped location scores and exceeding 69% of them.
- 55°F
- yearly average temperature, NOAA normal
- 74/100
- comfort score, above 69% of station-mapped location scores
- 49.1"
- annual precipitation · 6" snow
- 175 days
- growing season, frost-free days
Round Spring: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00237309 · Round Spring, MO 55°F mean · 49.1" precip
TEMP-MILD · RANK-UPPER · PHOTO-FINISH · PRCP-MID · SWING-MID · COMF-TOP · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-MILD 55°F
- RANK-UPPER #4,185
- PHOTO-FINISH ≈ Stendal
- PRCP-MID 49.1"
- SWING-MID 44°F
- COMF-TOP 74/100
- LOAD-HEAT 4,712 HDD
- STN-1 USC00237309
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Stendal, IN (+ 0 °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.
- Round Spring (this station) 55°F
- Cold Mtn Grove, MO 55°F
- Hot Wfo Sterling, VA 55°F
- Near Stendal, IN 55°F
- Near Grovespring, MO 55°F
Climate Living Index · Round Spring
Round Spring: 57/100 · grade C
Round Spring publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Round Spring, not an official NOAA rating. Rankings still use Comfort Score 74/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 5.6 inches/year | 70/100 · B |
| Annual temperature balance | 55.3°F · 12.2° from 67.5°F | 60/100 · C |
| Normal heat + freeze calendar | 133 calendar days | 57/100 · C |
| Precipitation balance | 49.1 in · 14.1 from 35 in | 50/100 · D |
| Frost-free season | 175 days/year | 46/100 · D |
Round Spring · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Round Spring is a temperate Köppen climate: Cfa
Coldest-month mean 32.8°F and warmest-month mean 77.2°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
- 77.2°F
- Coldest month
- 32.8°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 Round Spring sits across the climate record
Three NOAA fields for Round Spring's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 61st percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 21% wettest
- Round Spring's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 55th percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Round Spring compares across U.S. station-mapped locations
Round Spring's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
74 Top 31% score exceeds 69% 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%). This entry sits in this band.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 45°F (7°C) | 20°F (-6°C) | 33°F (0°C) | 2.7" | 1.0" | 26.8 | 0.0 |
| February | 50°F (10°C) | 23°F (-5°C) | 36°F (2°C) | 3.6" | 2.6" | 24.2 | 0.0 |
| March | 60°F (15°C) | 32°F (0°C) | 46°F (8°C) | 4.1" | 1.4" | 17.6 | 0.0 |
| April | 71°F (21°C) | 40°F (5°C) | 56°F (13°C) | 4.8" | 0.0" | 8.2 | 0.3 |
| May | 78°F (25°C) | 51°F (10°C) | 64°F (18°C) | 6.2" | 0.0" | 1.3 | 1.3 |
| June | 85°F (30°C) | 60°F (16°C) | 73°F (23°C) | 4.3" | 0.0" | 0.0 | 9.0 |
| July | 90°F (32°C) | 65°F (18°C) | 77°F (25°C) | 4.6" | 0.0" | 0.0 | 16.8 |
| August | 88°F (31°C) | 63°F (17°C) | 76°F (24°C) | 4.3" | 0.0" | 0.0 | 13.4 |
| September | 81°F (27°C) | 54°F (12°C) | 68°F (20°C) | 3.8" | 0.0" | 0.1 | 5.2 |
| October | 71°F (22°C) | 41°F (5°C) | 56°F (13°C) | 3.3" | 0.0" | 7.8 | 0.4 |
| November | 59°F (15°C) | 32°F (0°C) | 45°F (7°C) | 4.1" | 0.2" | 18.0 | 0.0 |
| December | 47°F (8°C) | 24°F (-5°C) | 36°F (2°C) | 3.5" | 0.4" | 24.9 | 0.0 |
The year, day by day
Round Spring works both ends of the calendar. Normal highs climb to 90°F by July 20 and hold at or above 90°F on 9 dates, then normal lows drop to freezing or below on 124 dates, bottoming at 20°F around January 22.
When the heat sits
Normal highs reach 90°F from July 20 through July 28, covering 9 dates. The broader mild season, normal highs of 70°F or more, runs April 13 to October 18.
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 16, then returns to freezing around November 14, covering 124 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 9, when 39% of years recorded at least a hundredth of an inch. The driest is September 30 at 24%. Summed across the calendar, that is about 107 wet dates a year.
The widest day
April 12 carries the biggest normal gap between afternoon and dawn, 31°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Round Spring.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 1.0"
7.3 days with precipitation
Snow: 2.6"
8.8 days with precipitation
Snow: 1.4"
9.8 days with precipitation
9.4 days with precipitation
11.8 days with precipitation
10.0 days with precipitation
9.3 days with precipitation
9.1 days with precipitation
7.5 days with precipitation
8.3 days with precipitation
Snow: 0.2"
7.7 days with precipitation
Snow: 0.4"
7.6 days with precipitation
Round Spring 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 20%, with neither reaching the 35% that would mark a distinct wet season. Round Spring has no dry season to plan around, though it does carry a 44.4°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 6.2" and January 2.7". The three wettest months together take 32% 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 Round Spring, it arrives in quantity
49.2" of precipitation falls across only about 107 wet days here, averaging 0.46 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 107 a year, 29% of all days
- Average depth per wet day
- 0.46 inches
- Most wet days
- May, about 12
- Fewest wet days
- January, about 7
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.
Snow reaches Round Spring, but rarely amounts to much
The normals record 5.6 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 4 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 16
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
175 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,712
Higher = more heating needed
Cooling Degree Days
1,218
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside MO closest to Round Spring 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 (55°F here).
- Beattyville, KY 55°F · 0.0°F off
- Eureka, KS 55°F · 0.0°F off
- Gatlinburg, TN 55°F · 0.0°F off
- Manchester, KY 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (49.1" here), excluding temperature-peer places.
- Walton, NY 49.1" · 0.0" off
- Clintwood, VA 49.2" · 0.0" off
- Boonton, NJ 49.2" · 0.0" off
- Little Valley, NY 49.1" · 0.0" off
Data-derived climate profile
How Round Spring's climate pattern fits together
heating led · wet · mid swing
Round Spring's energy balance leans toward cold weather: 4,712 annual heating degree days against 1,218 for cooling. Its 44.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Round Spring's frost-free season lasts about 175 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 Round Spring's middle-range seasonal profile. The measured spread is 44.4°F. The annual average is 55°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Round Spring carries 49.1 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 5.6 inches. 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 Round Spring'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 Round Spring, not an official NOAA class or a year-ahead forecast.
Questions about Round Spring's climate
How much rain does Round Spring get? ▼
How many days above 90°F does Round Spring get? ▼
How much energy does heating and cooling require in Round Spring? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Round Spring's primary station: ROUND SPRING 2SW (USC00237309). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Round Spring; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Round Spring 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.