October weather forecast
New Castle, NH

Share

Weather in October

October brings a noticeable change in New Castle weather, with temperatures dropping to 57.9°F (14.4°C). The fall's influence is evident as daylight and sunshine hours decrease noticeably. In spite of a significant rise in rainfall, the sea temperature takes a dip, making water sports less appealing. The gradually increasing wind speed adds to the chill of the city's climatic conditions.

Temperature

New Castle's October weather features a mild decline in high-temperatures, reducing from an agreeable 69.1°F (20.6°C) in September to a moderate 57.9°F (14.4°C). In October, the average low-temperature records at a chilly 47.1°F (8.4°C) during the nights.

Humidity

In New Castle, the average relative humidity in October is 78%.

Rainfall

The month with the most rainfall is October, when the rain falls for 13.3 days and typically aggregates up to 2.83" (72mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow. In New Castle, during the entire year, snow falls for 35.2 days and aggregates up to 16.97" (431mm) of snow.

Ocean temperature

In October, the average ocean temperature is 55.9°F (13.3°C).
Note: Beware when you're in 55.9°F (13.3°C) waters; 55.4°F (13°C) is chilling and anything below 50°F (10°C) could cause breathing hindrance and a sudden cold shock, given your physical condition.

Daylight

The average length of the day in October is 11h and 1min.
On the first day of the month, sunrise is at 6:40 am and sunset at 6:23 pm. On the last day of October, sunrise is at 7:17 am and sunset at 5:35 pm EDT.

Sunshine

The average sunshine in October is 6.1h.

UV index

The average daily maximum UV index in October is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 3 in October, converts into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Jul 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for New Castle in October?

The high-temperature during October is 57.9°F (14.4°C) and the low-temperature is 47.1°F (8.4°C).

What is the average humidity in October?

In New Castle, the average relative humidity in October is 78%.

What is the rainiest month?

The month with the most rainfall is October, when the rain falls for 13.3 days and typically aggregates up to 2.83" (72mm) of precipitation.

How many days does it rain in October?

In New Castle, New Hampshire, in October, during 13.3 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.

When does it start snowing?

October is the first month it typically snows. Throughout October, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow.

What is the ocean temperature in October?

In New Castle, the average seawater temperature in October is 55.9°F (13.3°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does New Castle have in October?

In October, the average day length is 11h and 1min.

When are sunrise and sunset in October?

On the first day of October in New Castle, sunrise is at 6:40 am and sunset at 6:23 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 5:35 pm EDT.

How long on average sun shines in October?

In October, the average sunshine duration is 6.1h.

What is the UV index reading in October?

In October, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
New Castle, NH

Average temperature in October - New Castle, NH
  • Average high temperature in October: 57.9°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in October: 47.1°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in October
New Castle, NH

Average pressure in October - New Castle, NH
  • Average pressure in October: 30"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in October
New Castle, NH

Average wind speed in October - New Castle, NH
  • Average wind speed in October: 9.3mph

The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in October
New Castle, NH

Average humidity in October - New Castle, NH
  • Average humidity in October: 78%

The month with the highest relative humidity is June (80%).
The months with the lowest relative humidity are April and November (75%).

Average rainfall in October
New Castle, NH

Average rainfall in October - New Castle, NH
  • Average rainfall in October: 2.83"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in October
New Castle, NH

Average rainfall days in October - New Castle, NH
  • Average rainfall days in October: 13.3 days

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (7.5 days).

Average snowfall in October
New Castle, NH

Average snowfall in October - New Castle, NH
  • Average snowfall in October: 0.31"

The month with the highest snowfall is January (4.02").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in October
New Castle, NH

Average snowfall days in October - New Castle, NH
  • Average snowfall days in October: 0.3 days

The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in October
New Castle, NH

Average sea temperature in October - New Castle, NH
  • Average sea temperature in October: 55.9°F

The best month for swimming (with the highest average sea temperature) is August (65.6°F).
The coldest month (with the lowest average sea temperature) is March (38.5°F).

Average daylight in October /
Average sunshine in October
New Castle, NH

Average daylight in October / Average sunshine in October - New Castle, NH
  • Average daylight in October: 11h and 0min

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 October: 6h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

Average sunshine days in October
New Castle, NH

Average sunshine days in October - New Castle, NH
  • Average sunshine days in October: 15.1 days

The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in October
New Castle, NH

Average UV index in October - New Castle, NH
  • Average UV index in October: 3

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in October
New Castle, NH

Average cloud cover in October - New Castle, NH
  • Average cloud cover in October: 42

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in October
New Castle, NH

Average visibility in October - New Castle, NH
  • Average visibility in October: 6mi

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).

New Castle, New Hampshire, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location