Climate and monthly weather forecastJamestown, CO
Climate and monthly weather forecast
Weather in January
January, like December, in Jamestown, Colorado, is a wintry winter month, with an average temperature varying between 36.7°F (2.6°C) and 19°F (-7.2°C). January records an average high-temperature of a still cold 36.7°F (2.6°C), indicating a minor variation from the preceding month. Weather in January »Weather in February
February, the last month of the winter in Jamestown, is also a wintry month, with an average temperature fluctuating between 18°F (-7.8°C) and 36.1°F (2.3°C). Jamestown, Colorado, notes an average high-temperature of a still wintry 36.1°F (2.3°C) in February, displaying minor variation from January. Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Jamestown, Colorado, with an average temperature fluctuating between 26.1°F (-3.3°C) and 46.4°F (8°C). March comes with an increase, with the average high-temperature moving from a cold 36.1°F (2.3°C) in February to a chilly 46.4°F (8°C). Weather in March »Weather in April
April is a fresh spring month in Jamestown, Colorado, with an average temperature fluctuating between 52.3°F (11.3°C) and 30.7°F (-0.7°C). As Jamestown transitions into April, a marginal rise in the average high-temperature is observed, moving from a chilly 46.4°F (8°C) in March to a cool 52.3°F (11.3°C). Weather in April »Weather in May
May, the last month of the spring in Jamestown, is an enjoyable month, with an average temperature fluctuating between 61°F (16.1°C) and 38.7°F (3.7°C). A slight uplift in the average high-temperature marks May, adjusting from April's cool 52.3°F (11.3°C) to a comfortable 61°F (16.1°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Jamestown, Colorado, with temperature in the range of an average low of 50°F (10°C) and an average high of 76.6°F (24.8°C). June's onset witnesses a marked shift in the average high-temperature, moving from a refreshing 61°F (16.1°C) in May to a moderately hot 76.6°F (24.8°C). Weather in June »Weather in July
July, like June, in Jamestown, Colorado, is another warm summer month, with an average temperature ranging between min 55.2°F (12.9°C) and max 80.4°F (26.9°C). July tends to be the warmest month, with temperatures averaging a daily high of 80.4°F (26.9°C) and a low of 55.2°F (12.9°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in Jamestown, Colorado, with an average temperature varying between 79.5°F (26.4°C) and 54.1°F (12.3°C). The shift to August signals an average high-temperature of a still moderately hot 79.5°F (26.4°C), subtly varied from July's 80.4°F (26.9°C). Weather in August »Weather in September
September, the first month of the autumn in Jamestown, is also an agreeable month, with an average temperature varying between 47.8°F (8.8°C) and 72.3°F (22.4°C). A mild shift in the average high-temperature occurs in September, reducing from a warm 79.5°F (26.4°C) in August to a pleasant 72.3°F (22.4°C). Weather in September »Weather in October
October, like September, is another mild autumn month in Jamestown, Colorado, with temperature in the range of an average high of 57.2°F (14°C) and an average low of 35.2°F (1.8°C). With the onset of October, Jamestown experiences a noticeable temperature shift, with the average high-temperature receding from an agreeable 72.3°F (22.4°C) in September to a refreshing 57.2°F (14°C). Weather in October »Weather in November
The last month of the autumn, November, is also a frosty month in Jamestown, Colorado, with an average temperature ranging between min 26.4°F (-3.1°C) and max 46°F (7.8°C). November's onset brings a slight change in high-temperatures, falling from a mild 57.2°F (14°C) in October to a chilly 46°F (7.8°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Jamestown, Colorado, with temperature in the range of an average low of 18.1°F (-7.7°C) and an average high of 35.2°F (1.8°C). Jamestown's coldest temperatures are experienced in December, with average high temperatures of 35.2°F (1.8°C) and lows of 18.1°F (-7.7°C). Weather in December »Updated: Aug 1, 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 month with the least rainfall is January, when the rain falls for 4.3 days and typically collects 0.39" (10mm) of precipitation.
Throughout the year, there are 117.3 rainfall days, and 14.17" (360mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
Throughout the year, in Jamestown, there are 44.8 snowfall days, and 37.01" (940mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the most humid month, with an average relative humidity of 70%.
February has the least sunshine of the year, with an average of 6.6h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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 is April, when snow falls for 4.9 days and typically aggregates up to 7.76" (197mm) of snow.
The month with the most rainfall is May, when the rain falls for 17.5 days and typically aggregates up to 2.48" (63mm) of precipitation.
June, August and September, with an average relative humidity of 45%, are the least humid months.
In Jamestown, snow does not fall in June through September.
With an average of 15h and 0min of daylight, June has the longest days of the year.
The months with the most sunshine are June and July, with an average of 11.7h of sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 5.
July stands out as Jamestown's warmest month, with temperatures ranging between an average high of 80.4°F (26.9°C) and a low of 55.2°F (12.9°C).
December, characterized by an average high temperature of 35.2°F (1.8°C) and a low temperature of 18.1°F (-7.7°C), is generally the coldest month.
The month with the shortest days is December, with an average of 9h and 24min of daylight.
Average temperature
Jamestown, CO
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is December (35.2°F).
The month with the highest average low temperature is July (55.2°F).
The coldest month (with the lowest average low temperature) is February (18°F).
Average pressure
Jamestown, CO
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30"Hg - Average pressure in April:
29.92"Hg - Average pressure in May:
29.92"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April, May and June (29.92"Hg).
Average wind speed
Jamestown, CO
- Average wind speed in January:
7.3mph - Average wind speed in February:
6.9mph - Average wind speed in March:
6.9mph - Average wind speed in April:
6.6mph - Average wind speed in May:
5.7mph - Average wind speed in June:
6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
5.7mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.8mph - Average wind speed in December:
6.8mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest months (with the lowest average wind speed) are May, July, August and September (5.7mph).
Average humidity
Jamestown, CO
The month with the highest relative humidity is February (70%).
The months with the lowest relative humidity are June, August and September (45%).
Average rainfall
Jamestown, CO
- Average rainfall in January:
0.39" - Average rainfall in February:
0.75" - Average rainfall in March:
1.14" - Average rainfall in April:
1.65" - Average rainfall in May:
2.48" - Average rainfall in June:
1.5"
- Average rainfall in July:
1.89" - Average rainfall in August:
1.26" - Average rainfall in September:
1.02" - Average rainfall in October:
0.91" - Average rainfall in November:
0.67" - Average rainfall in December:
0.51"
The wettest month (with the highest rainfall) is May (2.48").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days
Jamestown, CO
- Average rainfall days in January:
4.3 days - Average rainfall days in February:
4 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
17.5 days - Average rainfall days in June:
13.4 days
- Average rainfall days in July:
17.8 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
9.9 days - Average rainfall days in October:
7 days - Average rainfall days in November:
3.3 days - Average rainfall days in December:
3.9 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (3.3 days).
Average snowfall
Jamestown, CO
- Average snowfall in January:
2.87" - Average snowfall in February:
5.83" - Average snowfall in March:
6.26" - Average snowfall in April:
7.76" - Average snowfall in May:
1.65" - Average snowfall in June:
0"
The month with the highest snowfall is April (7.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Jamestown, CO
- Average snowfall days in January:
6.3 days - Average snowfall days in February:
10.3 days - Average snowfall days in March:
6.1 days - Average snowfall days in April:
4.9 days - Average snowfall days in May:
1.7 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
2.6 days - Average snowfall days in November:
5.6 days - Average snowfall days in December:
7.2 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight / Average sunshine
Jamestown, CO
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 24min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
6h and 54min - Average sunshine in February:
6h and 36min - Average sunshine in March:
8h and 42min - Average sunshine in April:
10h and 18min - Average sunshine in May:
10h and 42min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
11h and 42min - Average sunshine in August:
11h and 36min - Average sunshine in September:
10h and 54min - Average sunshine in October:
7h and 18min - Average sunshine in November:
7h and 6min - Average sunshine in December:
6h and 48min
The months with the most sunshine are June and July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days
Jamestown, CO
- Average sunshine days in January:
22.2 days - Average sunshine days in February:
15.8 days - Average sunshine days in March:
17.1 days - Average sunshine days in April:
13.2 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
14.3 days
- Average sunshine days in July:
9.9 days - Average sunshine days in August:
12.4 days - Average sunshine days in September:
17.6 days - Average sunshine days in October:
20.2 days - Average sunshine days in November:
21.9 days - Average sunshine days in December:
21.9 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is July (9.9 days).
Average UV index
Jamestown, CO
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, November and December (UV index 2).
Average cloud cover
Jamestown, CO
The months with the most cloud cover are April and May (Cloud cover 28).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility
Jamestown, CO
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).
