Climate and monthly weather forecastRock River, WY
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Rock River, Wyoming, with temperature in the range of an average low of 14.5°F (-9.7°C) and an average high of 29.1°F (-1.6°C). The average high-temperature during January registers at a still freezing cold 29.1°F (-1.6°C), maintaining a close resemblance to the previous month. Weather in January »Weather in February
February, the last month of the winter in Rock River, is also a subzero cold month, with an average temperature ranging between min 15.6°F (-9.1°C) and max 29.8°F (-1.2°C). Rock River records an average high-temperature of a still subzero cold 29.8°F (-1.2°C) in February, maintaining a close correlation with January's 29.1°F (-1.6°C). Weather in February »Weather in March
March, the first month of the spring in Rock River, is a cold month, with an average temperature varying between 24.1°F (-4.4°C) and 40.1°F (4.5°C). With the onset of March, Rock River experiences a temperature shift, with the average high-temperature moving from a subzero cold 29.8°F (-1.2°C) in February to an icy 40.1°F (4.5°C). Weather in March »Weather in April
April is a chilly spring month in Rock River, Wyoming, with an average temperature varying between 46°F (7.8°C) and 28.8°F (-1.8°C). Rock River's transition into April brings a slight rise in the average high-temperature, moving from an icy 40.1°F (4.5°C) in March to a frosty 46°F (7.8°C). Weather in April »Weather in May
The last month of the spring, May, is a refreshing month in Rock River, Wyoming, with an average temperature fluctuating between 56.5°F (13.6°C) and 37°F (2.8°C). With the onset of May, Rock River's average high-temperature experiences a rise, moving from April's frosty 46°F (7.8°C) to a refreshing 56.5°F (13.6°C). Weather in May »Weather in June
The first month of the summer, June, is an agreeable month in Rock River, Wyoming, with an average temperature fluctuating between 48.2°F (9°C) and 71.2°F (21.8°C). Rock River's June weather is characterized by a distinct upsurge in high-temperatures, soaring from May's refreshing 56.5°F (13.6°C) to an agreeable 71.2°F (21.8°C). Weather in June »Weather in July
July in Rock River, Wyoming, is a moderately hot summer month, with an average temperature fluctuating between 54.1°F (12.3°C) and 76.8°F (24.9°C). Rock River's temperatures tend to reach their peak averages in July, with a high of 76.8°F (24.9°C) and a low of 54.1°F (12.3°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Rock River, Wyoming, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 52.3°F (11.3°C). As Rock River transitions into August, the average high-temperature stands at a still moderately hot 75.7°F (24.3°C), offering little variation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Rock River, is also an agreeable month, with an average temperature varying between 46.6°F (8.1°C) and 68.4°F (20.2°C). A mild drop in Rock River's average high-temperature is observed in September, transitioning from a warm 75.7°F (24.3°C) in August to a pleasant 68.4°F (20.2°C). Weather in September »Weather in October
October, the same as September, is a cool autumn month in Rock River, Wyoming, with an average temperature varying between 32.9°F (0.5°C) and 51.1°F (10.6°C). Rock River experiences a noticeable temperature shift with the start of October, with average high-temperatures moving from an agreeable 68.4°F (20.2°C) in September to a cool 51.1°F (10.6°C). Weather in October »Weather in November
The last month of the autumn, November, is also an icy month in Rock River, Wyoming, with temperature in the range of an average low of 23.5°F (-4.7°C) and an average high of 39.2°F (4°C). November brings a decrease in the average high-temperature, shifting from a fresh 51.1°F (10.6°C) in October to an icy 39.2°F (4°C). Weather in November »Weather in December
December, the first month of the winter in Rock River, is still a freezing cold month, with an average temperature fluctuating between 14.4°F (-9.8°C) and 28.2°F (-2.1°C). With its high average temperature of 28.2°F (-2.1°C) and a low of 14.4°F (-9.8°C), December is regarded as the coldest month. 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 75%, are most humid months in Rock River, Wyoming.
January is the month with the least rainfall in Rock River. Rain falls for 2.9 days and accumulates 0.35" (9mm) of precipitation.
Throughout the year, in Rock River, there are 101.4 rainfall days, and 14.37" (365mm) of precipitation is accumulated.
January through June, September through December are months with snowfall.
In Rock River, Wyoming, during the entire year, snow falls for 78.1 days and aggregates up to 44.8" (1138mm) of snow.
The months with the lowest UV index in Rock River are January through April, October through December, with an average maximum UV index of 2.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Rock River, 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 Rock River, Wyoming, is April, when snow falls for 12.5 days and typically aggregates up to 9.76" (248mm) of snow.
The month with the most rainfall in Rock River, Wyoming, is May, when the rain falls for 15.1 days and typically aggregates up to 2.68" (68mm) of precipitation.
The month with the longest days is June, with an average of 15h and 12min of daylight.
June through August, with an average maximum UV index of 5, are months with the highest UV index in Rock River.
July, with its high-temperature average of 76.8°F (24.9°C) and a low-temperature average of 54.1°F (12.3°C), is the warmest month.
July and August are months without snowfall in Rock River, Wyoming.
With an average of 11.6h of sunshine, July has the most sunshine of the year in Rock River.
August and September, with an average relative humidity of 43%, are the least humid months in Rock River.
Rock River's coldest month, December, registers temperatures that range from a high of 28.2°F (-2.1°C) to a low of 14.4°F (-9.8°C).
The month with the shortest days in Rock River is December, with an average of 9h and 12min of daylight.
The month with the least sunshine in Rock River is December, with an average of 6.4h of sunshine.
Average temperature
Rock River, 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 (28.2°F).
The month with the highest average low temperature is July (54.1°F).
The coldest month (with the lowest average low temperature) is December (14.4°F).
Average pressure
Rock River, WY
- Average pressure in January:
30.17"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
29.99"Hg - Average pressure in April:
29.91"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Rock River, WY
- Average wind speed in January:
14.5mph - Average wind speed in February:
14.4mph - Average wind speed in March:
13.5mph - Average wind speed in April:
13.2mph - Average wind speed in May:
11.2mph - Average wind speed in June:
10.9mph
- Average wind speed in July:
9.3mph - Average wind speed in August:
9.6mph - Average wind speed in September:
10.9mph - Average wind speed in October:
13mph - Average wind speed in November:
14mph - Average wind speed in December:
14.1mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest month (with the lowest average wind speed) is July (9.3mph).
Average humidity
Rock River, WY
The months with the highest relative humidity are January and February (75%).
The months with the lowest relative humidity are August and September (43%).
Average rainfall
Rock River, WY
- Average rainfall in January:
0.35" - Average rainfall in February:
0.63" - Average rainfall in March:
1.3" - Average rainfall in April:
1.93" - Average rainfall in May:
2.68" - Average rainfall in June:
1.54"
- Average rainfall in July:
1.57" - Average rainfall in August:
0.98" - Average rainfall in September:
1.02" - Average rainfall in October:
1.06" - Average rainfall in November:
0.79" - Average rainfall in December:
0.51"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days
Rock River, WY
- Average rainfall days in January:
2.9 days - Average rainfall days in February:
2.9 days - Average rainfall days in March:
6.9 days - Average rainfall days in April:
9.4 days - Average rainfall days in May:
15.1 days - Average rainfall days in June:
13.8 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
13.3 days - Average rainfall days in September:
9.7 days - Average rainfall days in October:
6.2 days - Average rainfall days in November:
2.9 days - Average rainfall days in December:
3.2 days
The months with the highest number of rainy days are May and July (15.1 days).
The months with the least rainy days are January, February and November (2.9 days).
Average snowfall
Rock River, WY
- Average snowfall in January:
2.09" - Average snowfall in February:
4.13" - Average snowfall in March:
7.52" - Average snowfall in April:
9.76" - Average snowfall in May:
6.69" - Average snowfall in June:
1.54"
The month with the highest snowfall is April (9.76").
The months with the least snowfall are July and August (0").
Average snowfall days
Rock River, WY
- Average snowfall days in January:
9.1 days - Average snowfall days in February:
10.9 days - Average snowfall days in March:
12 days - Average snowfall days in April:
12.5 days - Average snowfall days in May:
7.4 days - Average snowfall days in June:
0.7 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
1.1 days - Average snowfall days in October:
6.5 days - Average snowfall days in November:
9.1 days - Average snowfall days in December:
8.8 days
The month with the highest number of snowfall days is April (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight / Average sunshine
Rock River, 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:
6h and 48min - Average sunshine in February:
6h and 30min - Average sunshine in March:
8h and 36min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 18min - Average sunshine in June:
11h and 30min
- Average sunshine in July:
11h and 36min - Average sunshine in August:
11h and 30min - Average sunshine in September:
10h and 42min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 42min - Average sunshine in December:
6h and 24min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days
Rock River, WY
- Average sunshine days in January:
21.4 days - Average sunshine days in February:
16.2 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
9.8 days - Average sunshine days in May:
8.9 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
10.6 days - Average sunshine days in August:
12.2 days - Average sunshine days in September:
16.7 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
19.4 days - Average sunshine days in December:
20.6 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is May (8.9 days).
Average UV index
Rock River, 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
Rock River, WY
The month with the most cloud cover is February (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 17).
Average visibility
Rock River, WY
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
