Climate and monthly weather forecastMerna, WY
Climate and monthly weather forecast
Weather in January
January, like December, is another subzero cold winter month in Merna, Wyoming, with temperature in the range of an average high of 25.2°F (-3.8°C) and an average low of 5.2°F (-14.9°C). At the onset of January, Merna records an average high-temperature of a still freezing cold 25.2°F (-3.8°C), showing little deviation from the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another freezing cold month in Merna, Wyoming, with an average temperature fluctuating between 6.6°F (-14.1°C) and 26.1°F (-3.3°C). As February unfolds, the average high-temperature reaches a still subzero cold 26.1°F (-3.3°C), hinting at a slight fluctuation from the previous month. Weather in February »Weather in March
The first month of the spring, March, is an icy month in Merna, Wyoming, with temperature in the range of an average low of 16.3°F (-8.7°C) and an average high of 33.6°F (0.9°C). The commencement of March sees a minor shift in the average high-temperature, moving from a subzero cold 26.1°F (-3.3°C) in February to an icy 33.6°F (0.9°C). Weather in March »Weather in April
April is a frosty spring month in Merna, Wyoming, with an average temperature fluctuating between 26.2°F (-3.2°C) and 43°F (6.1°C). Noticing a change, the average high-temperature during April moves from March's cold 33.6°F (0.9°C) to a frosty 43°F (6.1°C). Weather in April »Weather in May
May, the last month of the spring in Merna, is a cool month, with an average temperature ranging between min 36.5°F (2.5°C) and max 55°F (12.8°C). With the onset of May, Merna experiences a temperature shift, with the average high-temperature moving from a chilly 43°F (6.1°C) in April to a cool 55°F (12.8°C). Weather in May »Weather in June
June, the first month of the summer in Merna, is a refreshing month, with an average temperature ranging between max 67.8°F (19.9°C) and min 45°F (7.2°C). An upsurge in temperatures occurs as May gives way to June, with average highs shifting from a fresh 55°F (12.8°C) to a comfortable 67.8°F (19.9°C). Weather in June »Weather in July
July is a warm summer month in Merna, Wyoming, with an average temperature ranging between max 76.8°F (24.9°C) and min 52°F (11.1°C). In Merna, July is the month with the highest recorded average temperatures, measuring a high of 76.8°F (24.9°C) and a low of 52°F (11.1°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Merna, Wyoming, with an average temperature varying between 51.3°F (10.7°C) and 75°F (23.9°C). With August's advent, Merna, Wyoming, sees an average high-temperature of a still warm 75°F (23.9°C), subtly shifted from July's 76.8°F (24.9°C). Weather in August »Weather in September
The first month of the autumn, September, is still a comfortable month in Merna, Wyoming, with an average temperature fluctuating between 44.1°F (6.7°C) and 66.4°F (19.1°C). Merna, Wyoming, records a mild change in average high-temperature during September, easing from a warm 75°F (23.9°C) in August to a refreshing 66.4°F (19.1°C). Weather in September »Weather in October
October, like September, is a frosty autumn month in Merna, Wyoming, with an average temperature fluctuating between 30.7°F (-0.7°C) and 49.1°F (9.5°C). As September transitions into October, a clear downswing in temperatures is observed, with average highs retreating from an enjoyable 66.4°F (19.1°C) to a frosty 49.1°F (9.5°C). Weather in October »Weather in November
The last month of the autumn, November, is another cold month in Merna, Wyoming, with an average temperature varying between 18.5°F (-7.5°C) and 35.4°F (1.9°C). November's arrival coincides with a drop in the average high-temperature, decreasing from October's frosty 49.1°F (9.5°C) to an icy 35.4°F (1.9°C). Weather in November »Weather in December
The first month of the winter, December, is still a freezing cold month in Merna, Wyoming, with temperature in the range of an average high of 23.7°F (-4.6°C) and an average low of 5°F (-15°C). In Merna, the lowest temperatures are generally noted in December, averaging a high of 23.7°F (-4.6°C) and a low of 5°F (-15°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
January and February, with an average relative humidity of 87%, are most humid months in Merna.
In Merna, Wyoming, during the entire year, the rain falls for 109.9 days and collects up to 10.59" (269mm) of precipitation.
January through June, September through December are months with snowfall.
In Merna, Wyoming, during the entire year, snow falls for 89 days and aggregates up to 43.43" (1103mm) of snow.
With an average of 6.2h of sunshine, January has the least sunshine of the year in Merna.
January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Merna, Wyoming.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Merna, Wyoming, 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.
The month with the most snowfall in Merna is April, when snow falls for 11.3 days and typically aggregates up to 7.36" (187mm) of snow.
May is the month with the most rainfall. Rain falls for 14.3 days and accumulates 1.65" (42mm) of precipitation.
With an average of 15h and 18min of daylight, June has the longest days of the year in Merna.
The months with the highest UV index in Merna are June through August, with an average maximum UV index of 5.
Merna, Wyoming, notes the warmest temperatures in July, with a average high of 76.8°F (24.9°C) and a low of 52°F (11.1°C).
The months with the least rainfall in Merna are July and August Rain falls for 8.5 days and accumulates 0.63" (16mm) of rain.
In Merna, Wyoming, snow does not fall in July and August.
July has the most sunshine of the year in Merna, Wyoming, with an average of 12h of sunshine.
With an average relative humidity of 39%, August is the least humid month.
December proves to be the coldest month in Merna, Wyoming, recording an average maximum temperature of 23.7°F (-4.6°C) and a minimum temperature of 5°F (-15°C).
With an average of 9h and 6min of daylight, December has the shortest days of the year in Merna.
Average temperature
Merna, WY
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is December (23.7°F).
The month with the highest average low temperature is July (52°F).
The coldest month (with the lowest average low temperature) is December (5°F).
Average pressure
Merna, WY
- Average pressure in January:
30.28"Hg - Average pressure in February:
30.16"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.05"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.25"Hg
The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Merna, WY
- Average wind speed in January:
5.5mph - Average wind speed in February:
5.8mph - Average wind speed in March:
5.8mph - Average wind speed in April:
6.9mph - Average wind speed in May:
6.9mph - Average wind speed in June:
7mph
- Average wind speed in July:
6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.8mph - Average wind speed in October:
6.2mph - Average wind speed in November:
5.7mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is June (7mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity
Merna, WY
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is August (39%).
Average rainfall
Merna, WY
- Average rainfall in January:
0.75" - Average rainfall in February:
0.91" - Average rainfall in March:
0.91" - Average rainfall in April:
1.46" - Average rainfall in May:
1.65" - Average rainfall in June:
0.75"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.63" - Average rainfall in September:
0.83" - Average rainfall in October:
0.71" - Average rainfall in November:
0.67" - Average rainfall in December:
0.71"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days
Merna, WY
- Average rainfall days in January:
8.1 days - Average rainfall days in February:
9.7 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
9.7 days - Average rainfall days in May:
14.3 days - Average rainfall days in June:
9.3 days
- Average rainfall days in July:
8.5 days - Average rainfall days in August:
8.2 days - Average rainfall days in September:
8.8 days - Average rainfall days in October:
7.1 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
10.5 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is November (6.9 days).
Average snowfall
Merna, WY
- Average snowfall in January:
5.94" - Average snowfall in February:
7.09" - Average snowfall in March:
6.34" - Average snowfall in April:
7.36" - Average snowfall in May:
2.36" - Average snowfall in June:
0.55"
The month with the highest snowfall is April (7.36").
The months with the least snowfall are July and August (0").
Average snowfall days
Merna, WY
- Average snowfall days in January:
13 days - Average snowfall days in February:
15.1 days - Average snowfall days in March:
15.1 days - Average snowfall days in April:
11.3 days - Average snowfall days in May:
3.8 days - Average snowfall days in June:
0.3 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:
10 days - Average snowfall days in December:
14.5 days
The months with the highest number of snowfall days are February and March (15.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Merna, WY
- Average daylight in January:
9h and 24min - 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 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
6h and 12min - Average sunshine in February:
6h and 24min - Average sunshine in March:
8h and 6min - Average sunshine in April:
10h and 18min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 54min - Average sunshine in September:
10h and 42min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 54min - Average sunshine in December:
6h and 24min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 12min).
Average sunshine days
Merna, WY
- Average sunshine days in January:
16.9 days - Average sunshine days in February:
11.9 days - Average sunshine days in March:
12.9 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
17.7 days
- Average sunshine days in July:
17.9 days - Average sunshine days in August:
18.4 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.6 days - Average sunshine days in November:
18.3 days - Average sunshine days in December:
15.1 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is May (10.9 days).
Average UV index
Merna, WY
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover
Merna, WY
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility
Merna, 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).
