PlainClimate
2026 data Public-data reference. official source

Dayton, WY Climate

Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →

30-year climate normals from 1 weather station (1991-2020).

Dayton, Wyoming has an average annual temperature of 44°F and a climate comfort score of 37/100 (Below Average). Annual precipitation totals 18.0", including 68.3" of snow. Based on NOAA 30-year normals (1991–2020).

Avg Temperature

44°F (7°C)

Avg High

58°F

Avg Low

29°F

Annual Precip

18.0"

Annual Snow

68.3"

Comfort Score

37/100

Below Average

Climate Comfort Score

37/100

Below Average

Avg Annual Temperature

44°F

30-year mean (NOAA NCEI)

Annual Precipitation

18.0"

Plus 68.3" of snow

Comfort score vs national 100-point ceiling (Dayton) 37.0%
National median (≈55)

PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Dayton area.

Warming context for Dayton

Methodology

How the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Dayton captures average conditions across the spread shown — the most recent decade is warmer than the 30-year mean.

Warming context — U.S. vs global, with Paris reference lines Anomaly chart from 1900 to 2024. Local series shows warming of 0.11 °C per decade versus a global rate of 0.11 °C per decade (ratio 1.00). Paris Agreement thresholds at 1.5 and 2.0 °C are dashed. -1.0°C -0.5°C +0.0°C +0.5°C +1.0°C +1.5°C +2.0°C +2.5°C Paris 1.5°C Paris 2.0°C 1900192019401960198020002020
  • 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
Sources: NOAA NCEI, NASA GISTEMP. Paris thresholds per IPCC AR6 WG1.

Monthly Temperatures

Average daily high and low temperatures by month

Month Avg High Avg Low Mean
January 36°F (2°C) 10°F (-12°C) 23°F (-5°C)
February 38°F (3°C) 12°F (-11°C) 25°F (-4°C)
March 47°F (8°C) 20°F (-7°C) 34°F (1°C)
April 55°F (13°C) 29°F (-2°C) 42°F (6°C)
May 65°F (18°C) 38°F (3°C) 51°F (11°C)
June 75°F (24°C) 45°F (7°C) 60°F (16°C)
July 85°F (30°C) 51°F (11°C) 68°F (20°C)
August 84°F (29°C) 50°F (10°C) 67°F (19°C)
September 73°F (23°C) 40°F (5°C) 57°F (14°C)
October 59°F (15°C) 30°F (-1°C) 45°F (7°C)
November 46°F (8°C) 18°F (-8°C) 32°F (0°C)
December 36°F (2°C) 10°F (-12°C) 23°F (-5°C)

Monthly Precipitation

Average monthly rainfall and snowfall

January 0.8"

Snow: 10.8"

6.7 days with precipitation

February 0.9"

Snow: 11.1"

6.8 days with precipitation

March 1.5"

Snow: 12.0"

8.2 days with precipitation

April 2.1"

Snow: 7.1"

10.3 days with precipitation

May 3.4"

Snow: 1.4"

11.2 days with precipitation

June 2.0"

9.8 days with precipitation

July 1.2"

6.5 days with precipitation

August 0.9"

5.7 days with precipitation

September 1.6"

Snow: 0.3"

6.9 days with precipitation

October 1.9"

Snow: 6.4"

8.8 days with precipitation

November 1.1"

Snow: 7.5"

6.6 days with precipitation

December 0.8"

Snow: 11.7"

6.6 days with precipitation

Frost Dates & Growing Season

First Fall Freeze

September 18

50% probability date

Last Spring Freeze

May 24

50% probability date

Heating & Cooling Degree Days

Annual totals indicate energy demand for heating and cooling

Heating Degree Days

7,972

Higher = more heating needed

Cooling Degree Days

294

Higher = more cooling needed

Warmest Month

July

Coldest Month

December

Related Data

Climate Guides

Climate Insight: Dayton, WY

The NOAA 1991–2020 climate normals describe Dayton, Wyoming as a location with an annual average temperature of 44°F, ranging from a mean daily high of 58°F to a mean daily low of 29°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00482399, 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. Dayton receives roughly 18.0 inches of precipitation each year, with 68.3 inches typically falling as snow. Growing-season length varies with elevation and microclimate, with the last spring freeze near May 24 and the first fall freeze near September 18. For energy use, 7,972 heating degree days and 294 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Dayton scores 37/100 (Below Average), 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 December-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 Dayton, WY?
The average annual temperature in Dayton, Wyoming is 44°F. The warmest month averages 85°F (30°C) and the coldest averages 10°F (-12°C).
How much rain does Dayton get?
Dayton receives 18.0 inches of precipitation annually, including 68.3 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Dayton?
Dayton has a climate comfort score of 37/100 (Below Average). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Dayton?
Growing season data is not available for Dayton.
How much energy does heating and cooling require in Dayton?
Dayton has 7,972 heating degree days and 294 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 Dayton 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 USC00482399. 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: USC00482399. For informational purposes only.

Related

Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial