Climate and monthly weather forecastOpal, WY
Climate and monthly weather forecast
Weather in January
January, the same as December, in Opal, Wyoming, is a freezing cold winter month, with an average temperature ranging between min 9.9°F (-12.3°C) and max 26.6°F (-3°C). January experiences an average high-temperature of a still subzero cold 26.6°F (-3°C), barely different from December's 25.7°F (-3.5°C). Weather in January »Weather in February
The last month of the winter, February, is also a subzero cold month in Opal, Wyoming, with an average temperature varying between 12°F (-11.1°C) and 27.9°F (-2.3°C). Opal, Wyoming, registers an average high-temperature of a still freezing cold 27.9°F (-2.3°C) at the commencement of February, closely related to the preceding month. Weather in February »Weather in March
March, the first month of the spring in Opal, is a wintry month, with temperature in the range of an average high of 36.5°F (2.5°C) and an average low of 21°F (-6.1°C). March showcases a minor temperature ascent, adjusting from February's subzero cold 27.9°F (-2.3°C) to an icy 36.5°F (2.5°C). Weather in March »Weather in April
April is a chilly spring month in Opal, Wyoming, with temperature in the range of an average low of 28.8°F (-1.8°C) and an average high of 46°F (7.8°C). April's arrival brings a temperature shift, moving from a wintry 36.5°F (2.5°C) in March to a chilly 46°F (7.8°C). Weather in April »Weather in May
The last month of the spring, May, is a moderate month in Opal, Wyoming, with an average temperature ranging between min 37.6°F (3.1°C) and max 57.6°F (14.2°C). As April transitions into May, Opal sees a rise in the average high-temperature, moving from a chilly 46°F (7.8°C) to a mild 57.6°F (14.2°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Opal, Wyoming, with an average temperature fluctuating between 71.2°F (21.8°C) and 46.8°F (8.2°C). The start of June brings a rise in the average high-temperature, moving from a mild 57.6°F (14.2°C) in May to a pleasant 71.2°F (21.8°C). Weather in June »Weather in July
July is a warm summer month in Opal, Wyoming, with temperature in the range of an average high of 79.3°F (26.3°C) and an average low of 55°F (12.8°C). The month of July, characterized by an average high of 79.3°F (26.3°C) and a low of 55°F (12.8°C), is recognized as the warmest. Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Opal, Wyoming, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 54.1°F (12.3°C). The transition into August shows a subtle variation to a still moderately hot 77.9°F (25.5°C) from July's 79.3°F (26.3°C) in the average high-temperature. Weather in August »Weather in September
September, the first month of the autumn in Opal, is still a pleasant month, with an average temperature fluctuating between 68.9°F (20.5°C) and 47.7°F (8.7°C). The shift from August to September involves a decrease in the average high-temperature, from a moderately hot 77.9°F (25.5°C) to an agreeable 68.9°F (20.5°C). Weather in September »Weather in October
October, like September, in Opal, Wyoming, is another fresh autumn month, with an average temperature fluctuating between 33.6°F (0.9°C) and 51.4°F (10.8°C). October's onset brings a noticeable temperature drop, falling from an agreeable 68.9°F (20.5°C) in September to a fresh 51.4°F (10.8°C). Weather in October »Weather in November
November, the last month of the autumn in Opal, is another cold month, with an average temperature varying between 38.1°F (3.4°C) and 22.1°F (-5.5°C). November comes with a drop in the average high-temperature, falling from October's fresh 51.4°F (10.8°C) to a wintry 38.1°F (3.4°C). Weather in November »Weather in December
December, the first month of the winter in Opal, is still a freezing cold month, with an average temperature varying between 10°F (-12.2°C) and 25.7°F (-3.5°C). The coldest period is December, when temperatures fluctuate between an average high of 25.7°F (-3.5°C) and a low of 10°F (-12.2°C). Weather in December »Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The months with the highest humidity in Opal are January and February, with an average relative humidity of 87%.
Throughout the year, in Opal, Wyoming, there are 96.8 rainfall days, and 11.46" (291mm) of precipitation is accumulated.
Months with snowfall are January through June, September through December.
In Opal, during the entire year, snow falls for 88.9 days and aggregates up to 38.86" (987mm) of snow.
January has the least sunshine of the year, with an average of 5.7h of sunshine.
The months with the lowest UV index in Opal are January through April, October through December, with an average maximum UV index of 2.
March is the month with the most snowfall in Opal, Wyoming. Snow falls for 14.7 days and accumulates 6.81" (173mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Opal, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.
May is the month with the most rainfall. Rain falls for 13.3 days and accumulates 2.01" (51mm) of precipitation.
The month with the longest days is June, with an average of 15h and 12min of daylight.
The highest temperatures in Opal, Wyoming, are recorded in July, with averages reaching a high of 79.3°F (26.3°C) and a low of 55°F (12.8°C).
July and August are months without snowfall.
The months with the most sunshine in Opal are July and August, with an average of 11.8h of sunshine.
July is the month with the highest UV index, with an average maximum UV index of 6.
With an average relative humidity of 35%, August is the least humid month.
August is the month with the least rainfall in Opal, Wyoming. Rain falls for 8.1 days and accumulates 0.59" (15mm) of precipitation.
Opal notes the coldest temperatures in December, with a average high of 25.7°F (-3.5°C) and a low of 10°F (-12.2°C).
December has the shortest days of the year in Opal, Wyoming, with an average of 9h and 12min of daylight.
Average temperature
Opal, WY
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (25.7°F).
The month with the highest average low temperature is July (55°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure
Opal, WY
- Average pressure in January:
30.29"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.95"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.24"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Opal, WY
- Average wind speed in January:
8.1mph - Average wind speed in February:
9.2mph - Average wind speed in March:
8.5mph - Average wind speed in April:
9.8mph - Average wind speed in May:
9.1mph - Average wind speed in June:
9.2mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7.8mph - Average wind speed in September:
8.3mph - Average wind speed in October:
8.9mph - Average wind speed in November:
8.5mph - Average wind speed in December:
7.8mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity
Opal, WY
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is August (35%).
Average rainfall
Opal, WY
- Average rainfall in January:
0.75" - Average rainfall in February:
0.98" - Average rainfall in March:
1.06" - Average rainfall in April:
1.38" - Average rainfall in May:
2.01" - Average rainfall in June:
0.91"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.59" - Average rainfall in September:
0.83" - Average rainfall in October:
0.83" - Average rainfall in November:
0.67" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is May (2.01").
The driest month (with the least rainfall) is August (0.59").
Average rainfall days
Opal, WY
- Average rainfall days in January:
7 days - Average rainfall days in February:
5 days - Average rainfall days in March:
8.6 days - Average rainfall days in April:
10.9 days - Average rainfall days in May:
13.3 days - Average rainfall days in June:
9.3 days
- Average rainfall days in July:
7.5 days - Average rainfall days in August:
8.1 days - Average rainfall days in September:
8.6 days - Average rainfall days in October:
7 days - Average rainfall days in November:
5.1 days - Average rainfall days in December:
6.4 days
The month with the highest number of rainy days is May (13.3 days).
The month with the least rainy days is February (5 days).
Average snowfall
Opal, WY
- Average snowfall in January:
4.45" - Average snowfall in February:
5.83" - Average snowfall in March:
6.81" - Average snowfall in April:
6.26" - Average snowfall in May:
3.7" - Average snowfall in June:
0.55"
The month with the highest snowfall is March (6.81").
The months with the least snowfall are July and August (0").
Average snowfall days
Opal, WY
- Average snowfall days in January:
12.9 days - Average snowfall days in February:
15.3 days - Average snowfall days in March:
14.7 days - Average snowfall days in April:
11.5 days - Average snowfall days in May:
5.1 days - Average snowfall days in June:
0.9 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.7 days - Average snowfall days in October:
5.2 days - Average snowfall days in November:
9.1 days - Average snowfall days in December:
13.5 days
The month with the highest number of snowfall days is February (15.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Opal, WY
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
5h and 42min - Average sunshine in February:
6h and 0min - Average sunshine in March:
8h and 0min - Average sunshine in April:
9h and 54min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 48min - Average sunshine in August:
11h and 48min - Average sunshine in September:
10h and 30min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 42min - Average sunshine in December:
5h and 54min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days
Opal, WY
- Average sunshine days in January:
17.3 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
12.1 days - Average sunshine days in April:
9.7 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
17.3 days
- Average sunshine days in July:
19.3 days - Average sunshine days in August:
18.7 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
15.8 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is April (9.7 days).
Average UV index
Opal, WY
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover
Opal, WY
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility
Opal, WY
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
