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Contents
- The climate of New Castle
- The best time to visit New Castle
- The worst time to visit New Castle
- Spring weather in New Castle
- Summer weather in New Castle
- Autumn weather in New Castle
- Winter weather in New Castle
- 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
The climate of New Castle
New Castle, Indiana, USA falls under the Köppen climate categorization of Dfa, indicating a humid continental climate with no dry season, and hot summers. Due to its geographical position in the Midwest and proximity to the prairies, it experiences significant weather changes throughout the year.
A look at the averages in the weather parameters reveals the fluctuation in climate throughout the year. Temperature ranges from a high of 32.2°F (0.1°C) to a low of 20.5°F (-6.4°C) in January, escalating to highs of 81°F (27.2°C) and lows around 64.4°F (18°C) in July, the hottest month. Humidity averages over the year range from 74% in October to 83% in January and December, indicating a relatively moist atmosphere.
Precipitation registers a yearly high of 3.9" (99mm) in May and a lower end of 1.85" (47mm) in February. Snowfall is primarily a feature of winter months, maximizing at 3.31" (84mm) in December, while summer and early autumn months usually do not record any snow. The daylight hours increase from 9.7 hours in January to a maximum of 15 hours in June, while sunshine hours grow to a high of 10.1 hours in June from just 3.6 hours in January.
The relatively unique weather condition in New Castle is the considerable snowfall in winter and total absence of it from May to September. Also, the region has relatively high cloud coverage throughout the year, peaking at 63% in January and reaching a low of 32% in August.
A look at the averages in the weather parameters reveals the fluctuation in climate throughout the year. Temperature ranges from a high of 32.2°F (0.1°C) to a low of 20.5°F (-6.4°C) in January, escalating to highs of 81°F (27.2°C) and lows around 64.4°F (18°C) in July, the hottest month. Humidity averages over the year range from 74% in October to 83% in January and December, indicating a relatively moist atmosphere.
Precipitation registers a yearly high of 3.9" (99mm) in May and a lower end of 1.85" (47mm) in February. Snowfall is primarily a feature of winter months, maximizing at 3.31" (84mm) in December, while summer and early autumn months usually do not record any snow. The daylight hours increase from 9.7 hours in January to a maximum of 15 hours in June, while sunshine hours grow to a high of 10.1 hours in June from just 3.6 hours in January.
The relatively unique weather condition in New Castle is the considerable snowfall in winter and total absence of it from May to September. Also, the region has relatively high cloud coverage throughout the year, peaking at 63% in January and reaching a low of 32% in August.
The best time to visit New Castle
Determining the best time to visit New Castle depends heavily on individual preferences for weather. For those who prefer warm and sunny weather, the optimal time to visit would be between June and August. During these months, temperatures average from 71.2°F (21.8°C) to 81°F (27.2°C) with maximum daylight hours of 14.4 to 15 and peak sunshine hours of 10.1.
For visitors interested in winter activities and can brave colder temperatures, December presents a welcoming opportunity with 3.31" (84mm) of snow and an average temperature from 37.9°F (3.3°C) to 27.9°F (-2.3°C).
For visitors interested in winter activities and can brave colder temperatures, December presents a welcoming opportunity with 3.31" (84mm) of snow and an average temperature from 37.9°F (3.3°C) to 27.9°F (-2.3°C).
The worst time to visit New Castle
Tourists avoiding colder temperatures and snow might find January and February unfavorable due to average temperatures falling between 32.2°F (0.1°C) to 20.5°F (-6.4°C) and 36.9°F (2.7°C) to 24.1°F (-4.4°C) respectively. Additionally, these months record the highest average relative humidity of 83% and 82%, which may cause further discomfort.
Spring weather in New Castle
The spring season in New Castle typically sees an increase in temperature ranges from 48.6°F (9.2°C) to 33.6°F (0.9°C) in March to 71.2°F (21.8°C) to 54.7°F (12.6°C) in May. Rainfall increases from March to May, peaking at 3.9" (99mm), while snowfall diminishes completely. Daylight hours extend from 12 hours in March to 14.4 hours in May, enriching the environment with increased warmth and light.
Summer weather in New Castle
New Castle experiences hot summers, with July recording the highest temperatures from 81°F (27.2°C) to 64.4°F (18°C). The months from June to August also experience the longest daylight hours, peaking at 15 hours in June. Precipitation plateaus at around 3" (76mm) while no snowfall occurs.
Autumn weather in New Castle
Autumn in New Castle sees a gradual decline in temperature from 74.3°F (23.5°C) to 56.8°F (13.8°C) in September to 48.6°F (9.2°C) to 34.9°F (1.6°C) in November. Rainfall decreases over these months, marking down to 2.13" (54mm) in November. Meanwhile, daylight hours shorten, and snow starts appearing in November.
Winter weather in New Castle
Winter season embraces New Castle with cold temperatures, dropping from 37.9°F (3.3°C) to 27.9°F (-2.3°C) in December down to 32.2°F (0.1°C) to 20.5°F (-6.4°C) in January. Snowfall amounts to a high of 3.31" (84mm) in December and a low of 1.26" (32mm) in November. Daylight hours are at their shortest and cloud coverage is at its highest during these months.
Weather in January
The month of January in New Castle, Indiana, exhibits a truly wintry character. Even though the city yields to December’s chilling embrace, January takes over as the coldest month with temperatures dipping as low as 20.5°F (-6.4°C) and stretching only as high as 32.2°F (0.1°C). Weather in January »
Weather in February
February sees a subtle change in weather patterns, as the sheet of snow starts to thin slightly. The frosty grip of January eases gently, allowing temperatures to climb slightly to a maximum of 36.9°F (2.7°C) and a minimum of 24.1°F (-4.4°C). Weather in February »
Weather in March
March serves as the harbinger of spring for the inhabitants of New Castle. The sun seems to burn a little brighter, lifting temperatures to a high of 48.6°F (9.2°C) and a relatively mild low of 33.6°F (0.9°C). The snow gradually yields to a fresh canvas of green. Weather in March »
Weather in April
The delightful weather in April continues to cast a soothing spell over New Castle. April witnesses average daily temperatures escalating to 60.4°F (15.8°C) with lows around 44.1°F (6.7°C), signaling that spring has officially arrived. Weather in April »
Weather in May
May transfigures the weather in New Castle, Indiana, into full-blown spring mode. May arrives, bringing with it moderate temperatures that reach up to 71.2°F (21.8°C) during the day and drop to 54.7°F (12.6°C) at night. The days are longer, presenting an opportunity for increased outdoor activity. Weather in May »
Weather in June
June ushers in summer, with temperatures soaring to a high of 78.1°F (25.6°C) and a minimal fall to 62.2°F (16.8°C) during night hours. This rise in temperature is accompanied by plenty of sunshine, making outdoor activities enticing. Weather in June »
Weather in July
The mercury continues to climb in July, making it the hottest month in New Castle with peak temperatures touching 81°F (27.2°C) and plummeting only to 64.4°F (18°C) in the cooler nights. Despite the heat, there is an outburst of life and color. Weather in July »
Weather in August
August follows July's cue in New Castle by maintaining high temperatures with highs of 79.3°F (26.3°C) and lows around 62.2°F (16.8°C). As the heat gently withdraws, evenings become more comfortable. Yet, the essence of summer lingers across the city. Weather in August »
Weather in September
September in New Castle brings a welcomed change with temperatures retracting to highs of 74.3°F (23.5°C) and dropping to 56.8°F (13.8°C) during nights. The city says its goodbyes to summer as the leaves begin to change color. Weather in September »
Weather in October
October in New Castle is a celebration of autumn's magnificent colors. A visible dip in the temperature with highs around 62.1°F (16.7°C) and lows nearing 46.6°F (8.1°C) underscores the city's transition into cooler climes. Weather in October »
Weather in November
November ushers in the chill of winter in New Castle, Indiana, with temperatures ranging from 48.6°F (9.2°C) to 34.9°F (1.6°C). Frost begins to decorate the cityscape. Life slows down slightly, with evenings becoming quieter and nights longer. Weather in November »
Weather in December
December embraces New Castle with a blanket of snow, turning the city into a winter wonderland. Signing off the year with its lowest temperatures ranging from 37.9°F (3.3°C) to 27.9°F (-2.3°C), December heralds the arrival of fierce winter months. Weather in December »
Updated: Feb 12, 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 are the coldest months in New Castle?
January, marked by an average high-temperature of 32.2°F (0.1°C) and a low-temperature of 20.5°F (-6.4°C), is the coldest month.
What are the most humid months in New Castle?
January and December, with an average relative humidity of 83%, are most humid months.
How many days does it rain in New Castle?
Throughout the year, in New Castle, there are 169.4 rainfall days, and 31.77" (807mm) of precipitation is accumulated.
When does it snow in New Castle?
January through April, October through December are months with snowfall.
What is the snowiest month in New Castle?
January is the month with the most snowfall in New Castle, Indiana. Snow falls for 12.8 days and accumulates 3.31" (84mm) of snow.
How much does it snow in New Castle?
Throughout the year, there are 42.7 snowfall days, and 13.82" (351mm) of snow is accumulated.
What is the month with the least sunshine in New Castle?
January has the least sunshine of the year, with an average of 3.6h of sunshine.
What is the driest month in New Castle?
The month with the least rainfall in New Castle, Indiana, is February, when the rain falls for 8.8 days and typically collects 1.85" (47mm) of precipitation.
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, Indiana, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the wettest month in New Castle?
The month with the most rainfall is May, when the rain falls for 19.7 days and typically aggregates up to 3.9" (99mm) of precipitation.
When it does not snow in New Castle?
May through September are months without snowfall.
When is the highest UV index in New Castle?
May through July, with an average maximum UV index of 6, are months with the highest UV index.
When are the longest days in New Castle?
The month with the longest days in New Castle is June, with an average of 15h and 0min of daylight.
What month has the most sunshine in New Castle?
With an average of 10.1h of sunshine, June has the most sunshine of the year in New Castle.
What are the warmest months in New Castle?
New Castle's temperatures peak on average in July, reaching 81°F (27.2°C) at their highest and 64.4°F (18°C) at their lowest.
What is the least humid month in New Castle?
With an average relative humidity of 74%, October is the least humid month in New Castle, Indiana.
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.
What is the month with the lowest UV index in New Castle?
With an average maximum UV index of 1, December is the month with the lowest UV index in New Castle, Indiana.
Average temperature
New Castle, IN
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (32.2°F).
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure
New Castle, IN
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.1"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.13"Hg - Average pressure in December:
30.12"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
New Castle, IN
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.3mph - Average wind speed in March:
9.9mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.2mph - Average wind speed in June:
7.3mph
- Average wind speed in July:
6mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.4mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity
New Castle, IN
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall
New Castle, IN
- Average rainfall in January:
2.24" - Average rainfall in February:
1.85" - Average rainfall in March:
2.87" - Average rainfall in April:
3.43" - Average rainfall in May:
3.9" - Average rainfall in June:
3.23"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.8" - Average rainfall in September:
2.09" - Average rainfall in October:
2.09" - Average rainfall in November:
2.13" - Average rainfall in December:
2.28"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is February (1.85").
Average rainfall days
New Castle, IN
- Average rainfall days in January:
8.9 days - Average rainfall days in February:
8.8 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
16.9 days - Average rainfall days in May:
19.7 days - Average rainfall days in June:
16.7 days
- Average rainfall days in July:
17.9 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
15.2 days - Average rainfall days in October:
13.7 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
10.3 days
The month with the highest number of rainy days is May (19.7 days).
The month with the least rainy days is February (8.8 days).
Average snowfall
New Castle, IN
The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
New Castle, IN
- Average snowfall days in January:
12.8 days - Average snowfall days in February:
9.2 days - Average snowfall days in March:
5.7 days - Average snowfall days in April:
1.4 days - Average snowfall days in May:
0.1 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:
0.7 days - Average snowfall days in November:
2.9 days - Average snowfall days in December:
9.9 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
New Castle, IN
- Average daylight in January:
9h and 4min - 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:
15h and 0min
- 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: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in January:
3h and 4min - Average sunshine in February:
4h and 5min - Average sunshine in March:
5h and 5min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 4min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 3min - Average sunshine in September:
8h and 1min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 0min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days
New Castle, IN
- Average sunshine days in January:
11 days - Average sunshine days in February:
11.8 days - Average sunshine days in March:
12.2 days - Average sunshine days in April:
11.3 days - Average sunshine days in May:
9.1 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
11.1 days - Average sunshine days in September:
12.4 days - Average sunshine days in October:
16.1 days - Average sunshine days in November:
16.1 days - Average sunshine days in December:
13 days
The months with the most sunshine days are October and November (16.1 days).
The month with the least sunshine days is May (9.1 days).
Average UV index
New Castle, IN
The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover
New Castle, IN
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility
New Castle, IN
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
New Castle, Indiana, USA
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