Climate Comfort Score
74/100
Good
NOAA 1991–2020 normals 55°F annual avg Public-domain federal data
Round Spring, MO Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 55°F
- Avg annual temp
- 74/100
- Comfort score
- 49.1"
- Annual precip
- 175d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Round Spring
Round Spring, Missouri averages 55°F a year and scores 74/100 on the comfort index - good, milder than 71% of U.S. cities.
- 55°F
- yearly average temperature, NOAA normal
- 74/100
- comfort score, milder than 71% of U.S. cities
- 49.1"
- annual precipitation · 6" snow
- 175 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
55°F (13°C)
Avg High
69°F
Avg Low
42°F
Annual Precip
49.1"
Annual Snow
5.6"
Comfort Score
74/100
Good
Avg Annual Temperature
55°F
30-year mean (NOAA NCEI)
Annual Precipitation
49.1"
Plus 5.6" of snow
Comfort score vs national 100-point ceiling (Round Spring) 74.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Round Spring area.
How Round Spring compares to every U.S. city
Round Spring's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
74 Top 29% higher than 71% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Round Spring
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Round Spring, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
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 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.7"
Snow: 1.0"
7.3 days with precipitation
February 3.6"
Snow: 2.6"
8.8 days with precipitation
March 4.1"
Snow: 1.4"
9.8 days with precipitation
April 4.8"
9.4 days with precipitation
May 6.2"
11.8 days with precipitation
June 4.3"
10.0 days with precipitation
July 4.6"
9.3 days with precipitation
August 4.3"
9.1 days with precipitation
September 3.8"
7.5 days with precipitation
October 3.3"
8.3 days with precipitation
November 4.1"
Snow: 0.2"
7.7 days with precipitation
December 3.5"
Snow: 0.4"
7.6 days with precipitation
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
What Round Spring's climate means for you
Round Spring runs 55°F a year - peaking in July, coldest in January.
- Gardeners get about 175 frost-free days, with the last spring freeze near April 24 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,712 heating and 1,218 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Round Spring, MO
In Round Spring, Missouri, the NOAA 1991–2020 climate normals put the annual average temperature at 55°F, ranging from a mean daily high of 69°F to a mean daily low of 42°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00237309, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in Round Spring should weigh precipitation alongside temperature: the annual average runs 49.1 inches, with 5.6 inches typically falling as snow. The frost-free season averages 175 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 24 and the first fall freeze near October 16. And on the energy front, 4,712 heating degree days and 1,218 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Round Spring scores 74/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Round Spring, MO? ▼
The average annual temperature in Round Spring, Missouri is 55°F. The warmest month averages 90°F (32°C) and the coldest averages 20°F (-6°C).
How much rain does Round Spring get? ▼
Round Spring receives 49.1 inches of precipitation annually, including 5.6 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Round Spring? ▼
Round Spring has a climate comfort score of 74/100 (Good), milder than 71% of U.S. cities in the PlainClimate database.
When is the growing season in Round Spring? ▼
Round Spring has approximately 175 frost-free days per year, with the last spring freeze around April 24 and the first fall freeze around October 16.
How much energy does heating and cooling require in Round Spring? ▼
Round Spring has 4,712 heating degree days and 1,218 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Round Spring climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00237309 near Round Spring.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00237309. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.