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Annual Average Maximum Temperature (F) 59.0
Average Minimum Temperature (F) 30.5
Total Precipitation (in) 6.5
Total Snowfall (in) 15.7
Western Regional Climate Center
Wyoming Road Information – 888-WYO-ROAD (996-7623) or in-state
dial 511 http://wyoroad.info
Due to its high elevation, Wyoming overall has a relatively cool
climate. However, the lower elevations in Lovell and the surrounding
Big Horn Basin are among the warmest parts of the state. Summer nights
are almost always cool, even with high daytime readings and it is
generally 20-30 degrees cooler in the nearby mountains.
In the wintertime, it is common to have rapid and frequent changes
between mild and cold spells. Many of the cold waves are not accompanied
by enough snowfall to cause severe conditions. During winter warm
spells, nighttime temperatures often remain above freezing and warm
Chinook winds are fairly frequent.
Snowfall in the lower elevations of the Big Horn Basin is considered
light to moderate and accumulations are generally less than 5 inches
during a single storm. Annual averages in the Big Horn Basin run
from 15 to 20 inches. The higher elevations of the mountains the
annual amounts are well over 200 inches. Wintertime snow accumulations
in the higher elevations and many area streams fed by the melting
snow furnish water for thousands of acres of irrigated land.
Early fall freezes and late spring freezes are commonplace, which
results in a relatively short growing season – averaging 135
days in many years. Sunshine days run from 60 percent in the winter
to roughly 75 percent in the summer. Because of very low amounts
of fog, haze, and smoke, the intensity of the sunshine is very high.
Precipitation is quite low and a majority of the annual total happens
in spring and early summer. The mountains to the east west block
a great deal of moisture-laden air resulting in the Big Horn Basin
being the driest part of the state.
The average relative humidity is low and helps contribute to delightful
summer weather. Summer ranges are generally 25-30 percent and occasionally
it will be in the 5-10 percent range. The nighttime range is usually
between 65 and 75 percent.
Hailstorms are the most destructive type of severe weather in the
area, with crop damage a common result. Tornadoes do occur, but a
far fewer and less destructive than those in the Midwest. Most touch
down for a very brief time, and most occur in the eastern portions
Lovell does not have strong prevailing winds throughout much of the
year. Average wind speeds at the Greybull Airport (32 miles south)
range from 4.1 miles per hour in January to 9.5 miles per hour in April,
with an annual average of 6.9. Wind direction is from the northwest
most of the year, but changes to east-southeast October through December.