PlainClimate
NOAA 1991–2020 normals 46°F annual avg Public-domain federal data

Boysen Dam, WY Climate

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

46°F
Avg annual temp
44/100
Comfort score
9.0"
Annual precip
155d
Growing season

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

The climate verdict for Boysen Dam

Boysen Dam, Wyoming averages 46°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.

46°F
yearly average temperature, NOAA normal
44/100
comfort score, milder than 8% of U.S. cities
9.0"
annual precipitation · 16" snow
155 days
frost-free growing season

Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.

Avg Temperature

46°F (8°C)

Avg High

60°F

Avg Low

33°F

Annual Precip

9.0"

Annual Snow

16.1"

Comfort Score

44/100

Moderate

Climate Comfort Score

44/100

Moderate

Avg Annual Temperature

46°F

30-year mean (NOAA NCEI)

Annual Precipitation

9.0"

Plus 16.1" of snow

Comfort score vs national 100-point ceiling (Boysen Dam) 44.0%
National median (63)

PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Boysen Dam area.

How Boysen Dam compares to every U.S. city

Boysen Dam's comfort score vs. all U.S. cities

PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals

44 Top 92% higher than 8% of 6,915 US cities

0–10: 0 US cities (0%). Below this entry. 10–20: 0 US cities (0%). Below this entry. 20–30: 58 US cities (1%). Below this entry. 30–40: 439 US cities (6%). Below this entry. 40–50: 1,302 US cities (19%). This entry sits in this band. 50–60: 1,433 US cities (21%). Above this entry. 60–70: 1,357 US cities (20%). Above this entry. 70–80: 1,102 US cities (16%). Above this entry. 80–90: 778 US cities (11%). Above this entry. 90–100: 420 US cities (6%). Above this entry. This city 0 100 every U.S. city, bucketed by value

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 Boysen Dam

Methodology

How the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Boysen Dam 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 30°F (-1°C) 5°F (-15°C) 18°F (-8°C)
February 37°F (3°C) 11°F (-12°C) 24°F (-4°C)
March 50°F (10°C) 23°F (-5°C) 37°F (3°C)
April 59°F (15°C) 33°F (0°C) 46°F (8°C)
May 69°F (20°C) 43°F (6°C) 56°F (13°C)
June 81°F (27°C) 52°F (11°C) 66°F (19°C)
July 91°F (33°C) 60°F (15°C) 75°F (24°C)
August 89°F (31°C) 57°F (14°C) 73°F (23°C)
September 77°F (25°C) 47°F (8°C) 62°F (17°C)
October 60°F (16°C) 35°F (1°C) 48°F (9°C)
November 44°F (7°C) 22°F (-5°C) 33°F (1°C)
December 31°F (0°C) 9°F (-13°C) 20°F (-7°C)

Monthly Precipitation

Average monthly rainfall and snowfall

January 0.2"

Snow: 2.8"

2.9 days with precipitation

February 0.3"

Snow: 3.2"

3.5 days with precipitation

March 0.6"

Snow: 3.8"

4.1 days with precipitation

April 1.1"

Snow: 1.3"

5.9 days with precipitation

May 2.1"

Snow: 0.1"

8.1 days with precipitation

June 1.0"

5.9 days with precipitation

July 0.8"

5.0 days with precipitation

August 0.5"

4.1 days with precipitation

September 1.0"

Snow: 0.1"

4.8 days with precipitation

October 0.9"

Snow: 0.8"

4.3 days with precipitation

November 0.3"

Snow: 1.8"

3.3 days with precipitation

December 0.4"

Snow: 2.2"

3.7 days with precipitation

Frost Dates & Growing Season

First Fall Freeze

October 7

50% probability date

Last Spring Freeze

May 5

50% probability date

Growing Season

155 days

Heating & Cooling Degree Days

Annual totals indicate energy demand for heating and cooling

Heating Degree Days

7,515

Higher = more heating needed

Cooling Degree Days

769

Higher = more cooling needed

Warmest Month

July

Coldest Month

January

What Boysen Dam's climate means for you

Boysen Dam runs 46°F a year - peaking in July, coldest in January.

  • Gardeners get about 155 frost-free days, with the last spring freeze near May 5 - plan the planting calendar around it, not the regional average.
  • Energy bills track 7,515 heating and 769 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: Boysen Dam, WY

In Boysen Dam, Wyoming, the NOAA 1991–2020 climate normals put the annual average temperature at 46°F, ranging from a mean daily high of 60°F to a mean daily low of 33°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00481000, these numbers smooth out year-to-year noise into a working baseline for a typical month.

Boysen Dam averages 9.0 inches of precipitation a year, with 16.1 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 155 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 5 and the first fall freeze near October 7. As for energy demand, 7,515 heating degree days and 769 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Boysen Dam scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.

Frequently Asked Questions

What is the average temperature in Boysen Dam, WY?
The average annual temperature in Boysen Dam, Wyoming is 46°F. The warmest month averages 91°F (33°C) and the coldest averages 5°F (-15°C).
How much rain does Boysen Dam get?
Boysen Dam receives 9.0 inches of precipitation annually, including 16.1 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Boysen Dam?
Boysen Dam has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Boysen Dam?
Boysen Dam has approximately 155 frost-free days per year, with the last spring freeze around May 5 and the first fall freeze around October 7.
How much energy does heating and cooling require in Boysen Dam?
Boysen Dam has 7,515 heating degree days and 769 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 Boysen Dam climate data come from?
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00481000 near Boysen Dam.

Data Sources

Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00481000. For informational purposes only.

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.