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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is another subzero cold winter month in New Castle, Colorado, with temperature in the range of an average low of 12°F (-11.1°C) and an average high of 30.6°F (-0.8°C). With its high average temperature of 30.6°F (-0.8°C) and a low of 12°F (-11.1°C), January is regarded as the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is an icy month in New Castle, Colorado, with temperature in the range of an average high of 32.4°F (0.2°C) and an average low of 15.6°F (-9.1°C). In the transition from January to February, New Castle reports an average high-temperature of a cold 32.4°F (0.2°C), indicating a close resemblance to the prior month. Weather in February »
Weather in March
March, the first month of the spring in New Castle, is also a wintry month, with an average temperature varying between 24.3°F (-4.3°C) and 41.7°F (5.4°C). The rise of average high-temperatures is seen in March, with an increase from 32.4°F (0.2°C) in February to a still cold 41.7°F (5.4°C). Weather in March »
Weather in April
April is a chilly spring month in New Castle, Colorado, with an average temperature ranging between max 49.1°F (9.5°C) and min 30°F (-1.1°C). April comes with a subtle rise, with the average high-temperature adjusting from a wintry 41.7°F (5.4°C) in March to a chilly 49.1°F (9.5°C). Weather in April »
Weather in May
The last month of the spring, May, is a mild month in New Castle, Colorado, with an average temperature ranging between min 36.7°F (2.6°C) and max 60.6°F (15.9°C). New Castle's weather in May presents a rise in the average high-temperature, moving from a frosty 49.1°F (9.5°C) in April to a moderate 60.6°F (15.9°C). Weather in May »
Weather in June
The first month of the summer, June, is a warm month in New Castle, Colorado, with an average temperature ranging between min 44.2°F (6.8°C) and max 74.5°F (23.6°C). The transition from May to June brings a temperature rise, with average high-temperatures increasing from a mild 60.6°F (15.9°C) to a moderately hot 74.5°F (23.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in New Castle, Colorado, with an average temperature ranging between max 80.2°F (26.8°C) and min 50.4°F (10.2°C). July is the month that records the highest temperatures, with averages ranging from a high of 80.2°F (26.8°C) to a low of 50.4°F (10.2°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in New Castle, Colorado, with an average temperature fluctuating between 49.6°F (9.8°C) and 78.4°F (25.8°C). The arrival of August coincides with an average high-temperature of a still moderately hot 78.4°F (25.8°C), indicating a minimal shift from July's 80.2°F (26.8°C). Weather in August »
Weather in September
September, the first month of the autumn in New Castle, is also an agreeable month, with an average temperature fluctuating between 43.9°F (6.6°C) and 70.9°F (21.6°C). The transition into September involves a small decrease in the average high-temperature, dipping slightly from a moderately hot 78.4°F (25.8°C) in August to a pleasant 70.9°F (21.6°C). Weather in September »
Weather in October
October, like September, in New Castle, Colorado, is a cool autumn month, with temperature in the range of an average low of 33.1°F (0.6°C) and an average high of 54.7°F (12.6°C). October's arrival signals a distinct temperature shift, dropping from a pleasant 70.9°F (21.6°C) in September to a cool 54.7°F (12.6°C). Weather in October »
Weather in November
November, the last month of the autumn in New Castle, is also an icy month, with an average temperature varying between 42.1°F (5.6°C) and 23.4°F (-4.8°C). New Castle's average high-temperature decreases in November, falling from a fresh 54.7°F (12.6°C) in October to a wintry 42.1°F (5.6°C). Weather in November »
Weather in December
December, the first month of the winter in New Castle, is still a freezing cold month, with an average temperature varying between 30.7°F (-0.7°C) and 14.9°F (-9.5°C). Setting in of December comes with a decrease in the average high-temperature, moving from a wintry 42.1°F (5.6°C) in November to a freezing cold 30.7°F (-0.7°C). Weather in December »
Updated: Feb 10, 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
What is the coldest time of year in New Castle?
New Castle's coldest temperatures are experienced in January, with average high temperatures of 30.6°F (-0.8°C) and lows of 12°F (-11.1°C).
What is the most humid month in New Castle?
With an average relative humidity of 85%, January is the most humid month.
How much does it rain in New Castle?
Throughout the year, in New Castle, Colorado, there are 107.7 rainfall days, and 11.89" (302mm) of precipitation is accumulated.
When does it snow in New Castle?
Months with snowfall in New Castle are January through May, October through December.
How many days does it snow in New Castle?
In New Castle, Colorado, during the entire year, snow falls for 58.6 days and aggregates up to 36.85" (936mm) of snow.
What is the month with the least sunshine in New Castle?
With an average of 6.1h of sunshine, January has the least sunshine of the year in New Castle.
When is the lowest UV index in New Castle?
January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in New Castle, Colorado.
When does it snow the most in New Castle?
February is the month with the most snowfall. Snow falls for 11.8 days and accumulates 8.74" (222mm) of snow.
When is Daylight Saving Time (DST) in New Castle?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in New Castle, 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.
What is the wettest month in New Castle?
The month with the most rainfall is April, when the rain falls for 14 days and typically aggregates up to 1.57" (40mm) of precipitation.
What is the least humid month in New Castle?
The least humid month in New Castle, Colorado, is June, with an average relative humidity of 43%.
When it does not snow in New Castle?
In New Castle, Colorado, snow does not fall in June through September.
When are the longest days in New Castle?
With an average of 14h and 54min of daylight, June has the longest days of the year.
What is the month with the most sunshine in New Castle?
June through August, with an average of 11.9h of sunshine, are months with the most sunshine.
When is the highest UV index in New Castle?
The months with the highest UV index in New Castle, Colorado, are June through August, with an average maximum UV index of 5.
What part of the year is the hottest in New Castle?
The temperatures in New Castle reach their highest averages in July, with highs of 80.2°F (26.8°C) and lows of 50.4°F (10.2°C).
What is the driest month in New Castle?
September is the month with the least rainfall in New Castle. Rain falls for 7.9 days and accumulates 0.51" (13mm) of precipitation.
What is the month with the shortest days in New Castle?
With an average of 9h and 24min of daylight, December has the shortest days of the year in New Castle, Colorado.
Average temperature
New Castle, CO
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (30.6°F).
The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure
New Castle, CO
- Average pressure in January:
30.27"Hg - Average pressure in February:
30.14"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
30.03"Hg - Average pressure in August:
30.04"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.2"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is May (29.93"Hg).
Average wind speed
New Castle, CO
- Average wind speed in January:
4.1mph - Average wind speed in February:
4.7mph - Average wind speed in March:
5.3mph - Average wind speed in April:
5.8mph - Average wind speed in May:
5.8mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5mph - Average wind speed in August:
5mph - Average wind speed in September:
5.3mph - Average wind speed in October:
4.8mph - Average wind speed in November:
4.5mph - Average wind speed in December:
4.2mph
The windiest month (with the highest average wind speed) is June (6.2mph).
The calmest month (with the lowest average wind speed) is January (4.1mph).
Average humidity
New Castle, CO
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is June (43%).
Average rainfall
New Castle, CO
- Average rainfall in January:
1.1" - Average rainfall in February:
1.34" - Average rainfall in March:
1.42" - Average rainfall in April:
1.57" - Average rainfall in May:
0.98" - Average rainfall in June:
0.71"
- Average rainfall in July:
0.67" - Average rainfall in August:
0.55" - Average rainfall in September:
0.51" - Average rainfall in October:
1.06" - Average rainfall in November:
0.83" - Average rainfall in December:
1.14"
The wettest month (with the highest rainfall) is April (1.57").
The driest month (with the least rainfall) is September (0.51").
Average rainfall days
New Castle, CO
- Average rainfall days in January:
7.2 days - Average rainfall days in February:
7.2 days - Average rainfall days in March:
11.4 days - Average rainfall days in April:
14 days - Average rainfall days in May:
10.9 days - Average rainfall days in June:
5.9 days
- Average rainfall days in July:
11 days - Average rainfall days in August:
8.8 days - Average rainfall days in September:
7.9 days - Average rainfall days in October:
7.9 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is April (14 days).
The month with the least rainy days is June (5.9 days).
Average snowfall
New Castle, CO
- Average snowfall in January:
7.44" - Average snowfall in February:
8.74" - Average snowfall in March:
5.16" - Average snowfall in April:
3.19" - Average snowfall in May:
0.28" - Average snowfall in June:
0"
The month with the highest snowfall is February (8.74").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
New Castle, CO
- Average snowfall days in January:
13 days - Average snowfall days in February:
11.8 days - Average snowfall days in March:
8.3 days - Average snowfall days in April:
5.3 days - Average snowfall days in May:
0.7 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 days - Average snowfall days in October:
2 days - Average snowfall days in November:
6.5 days - Average snowfall days in December:
11 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
New Castle, CO
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 4min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
6h and 1min - Average sunshine in March:
8h and 3min - Average sunshine in April:
10h and 4min - Average sunshine in May:
11h and 2min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
11h and 5min - Average sunshine in August:
11h and 5min - Average sunshine in September:
11h and 0min - Average sunshine in October:
7h and 2min - Average sunshine in November:
7h and 1min - Average sunshine in December:
6h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days
New Castle, CO
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
12 days - Average sunshine days in March:
14.7 days - Average sunshine days in April:
11.7 days - Average sunshine days in May:
15.7 days - Average sunshine days in June:
20.7 days
- Average sunshine days in July:
14.6 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
17.7 days - Average sunshine days in October:
20 days - Average sunshine days in November:
19.8 days - Average sunshine days in December:
16.9 days
The month with the most sunshine days is June (20.7 days).
The month with the least sunshine days is April (11.7 days).
Average UV index
New Castle, 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, March, October, November and December (UV index 2).
Average cloud cover
New Castle, CO
The month with the most cloud cover is February (Cloud cover 39).
The months with the least cloud cover are June and September (Cloud cover 12).
Average visibility
New Castle, CO
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
New Castle, Colorado, USA
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