Climate Comfort Score
62/100
Good
2026 data Public-data reference. official source
30-year climate normals from 1 weather station (1991-2020).
Armour, South Dakota has an average annual temperature of 49°F and a climate comfort score of 62/100 (Good). Annual precipitation totals 25.4", including 34.4" of snow. Based on NOAA 30-year normals (1991–2020).
Avg Temperature
49°F (9°C)
Avg High
61°F
Avg Low
37°F
Annual Precip
25.4"
Annual Snow
34.4"
Comfort Score
62/100
Good
Avg Annual Temperature
49°F
30-year mean (NOAA NCEI)
Annual Precipitation
25.4"
Plus 34.4" of snow
Comfort score vs national 100-point ceiling (Armour) 62.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Armour area.
Warming context for Armour
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Armour captures average conditions across the spread shown — the most recent decade is warmer than the 30-year mean.
- 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 | 32°F (0°C) | 10°F (-12°C) | 21°F (-6°C) | 0.6" | 6.1" | 30.6 | 0.0 |
| February | 37°F (3°C) | 14°F (-10°C) | 26°F (-4°C) | 0.9" | 5.5" | 26.0 | 0.0 |
| March | 50°F (10°C) | 24°F (-4°C) | 37°F (3°C) | 1.2" | 6.3" | 23.7 | 0.0 |
| April | 62°F (17°C) | 35°F (2°C) | 49°F (9°C) | 3.3" | 4.1" | 10.5 | 0.3 |
| May | 73°F (23°C) | 46°F (8°C) | 60°F (15°C) | 4.0" | 0.0" | 1.1 | 0.8 |
| June | 82°F (28°C) | 58°F (14°C) | 70°F (21°C) | 3.7" | 0.0" | 0.0 | 4.4 |
| July | 88°F (31°C) | 62°F (17°C) | 75°F (24°C) | 2.7" | 0.0" | 0.0 | 12.4 |
| August | 86°F (30°C) | 60°F (16°C) | 73°F (23°C) | 2.8" | 0.0" | 0.0 | 10.0 |
| September | 79°F (26°C) | 52°F (11°C) | 65°F (19°C) | 2.4" | 0.0" | 0.6 | 5.1 |
| October | 64°F (18°C) | 38°F (3°C) | 51°F (11°C) | 2.1" | 1.2" | 8.3 | 0.4 |
| November | 48°F (9°C) | 25°F (-4°C) | 36°F (2°C) | 1.0" | 6.1" | 24.4 | 0.0 |
| December | 35°F (1°C) | 14°F (-10°C) | 25°F (-4°C) | 0.7" | 5.1" | 30.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.6"
Snow: 6.1"
3.8 days with precipitation
February 0.9"
Snow: 5.5"
4.5 days with precipitation
March 1.2"
Snow: 6.3"
5.2 days with precipitation
April 3.3"
Snow: 4.1"
9.0 days with precipitation
May 4.0"
9.5 days with precipitation
June 3.7"
9.8 days with precipitation
July 2.7"
8.6 days with precipitation
August 2.8"
7.0 days with precipitation
September 2.4"
6.1 days with precipitation
October 2.1"
Snow: 1.2"
6.1 days with precipitation
November 1.0"
Snow: 6.1"
4.1 days with precipitation
December 0.7"
Snow: 5.1"
2.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 6
50% probability date
Last Spring Freeze
May 3
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,747
Higher = more heating needed
Cooling Degree Days
929
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Related Data
PlainEnviro
EPA environmental data — pollution, water quality, and environmental health by location
PlainCarbon
Carbon emissions data — greenhouse gas reporting and facility-level CO2 data
PlainHazard
Natural disaster data — weather-related hazards, FEMA declarations, and risk profiles
PlainAirData
EPA air quality data — AQI readings, pollutant levels, and air quality trends
Climate Guides
Climate Insight: Armour, SD
The NOAA 1991–2020 climate normals describe Armour, South Dakota as a location with an annual average temperature of 49°F, ranging from a mean daily high of 61°F to a mean daily low of 37°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00390296, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Armour receives roughly 25.4 inches of precipitation each year, with 34.4 inches typically falling as snow. Growing-season length varies with elevation and microclimate, with the last spring freeze near May 3 and the first fall freeze near October 6. For energy use, 6,747 heating degree days and 929 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Armour scores 62/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows — shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Armour, SD? ▼
The average annual temperature in Armour, South Dakota is 49°F. The warmest month averages 88°F (31°C) and the coldest averages 10°F (-12°C).
How much rain does Armour get? ▼
Armour receives 25.4 inches of precipitation annually, including 34.4 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Armour? ▼
Armour has a climate comfort score of 62/100 (Good). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Armour? ▼
Growing season data is not available for Armour.
How much energy does heating and cooling require in Armour? ▼
Armour has 6,747 heating degree days and 929 cooling degree days annually. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this Armour climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USC00390296. These 30-year averages are the standard reference for typical weather conditions.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00390296. 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
