October weather forecast
New Castle, DE

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Weather in October

October brings in the charming weather of fall in New Castle. The average high temperature drops significantly, leading to cooler days. Rainy days show a minor increase compared to September. The fall foliage and the crisp weather make outdoor activities particularly enjoyable in this period. Despite the fall in temperatures, the sea temperature remains high enough for coastal activities.

Temperature

With the onset of October, New Castle's average high-temperature adjusts, receding from September's moderately hot 76.3°F (24.6°C) to a refreshing 64.8°F (18.2°C). During October, New Castle experiences a consistent low-temperature average of 50.4°F (10.2°C).

Humidity

With an average relative humidity of 78%, October is the most humid month.

Rainfall

In October, the rain falls for 10.5 days. Throughout October, 1.61" (41mm) of precipitation is accumulated. Throughout the year, in New Castle, there are 143.2 rainfall days, and 21.89" (556mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in New Castle.

Ocean temperature

In New Castle, in October, the average water temperature is 64.6°F (18.1°C).
Note: The majority find it unenjoyable to swim in 64.6°F (18.1°C). Breathing becomes tougher as the water temperature descends under 69.8°F (21°C).

Daylight

In New Castle, the average length of the day in October is 11h and 8min.
On the first day of October in New Castle, sunrise is at 6:59 am and sunset at 6:44 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 6:01 pm EDT.

Sunshine

In New Castle, the average sunshine in October is 5.7h.

UV index

In New Castle, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 4 in October translates into this advice:
Undertake precautions - Guarding against sun damage is counselled. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

What are the temperatures in New Castle in October?

In October, in New Castle, the average high-temperature is 64.8°F (18.2°C), and the average low-temperature is 50.4°F (10.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 89.6°F (32°C).

What is the most humid month in New Castle?

October is the most humid month in New Castle, Delaware, with an average relative humidity of 78%.

What is the average humidity in October in New Castle?

The average relative humidity in October in New Castle is 78%.

How many days does it rain in October in New Castle?

In October, in New Castle, Delaware, the rain falls for 10.5 days. Throughout October, 1.61" (41mm) of precipitation is accumulated.

When it does not snow in New Castle?

In New Castle, Delaware, snow does not fall in May through October.

Does it snow in New Castle in October?

In New Castle, in October, it doesn't snow. In November, it regularly snows.

What is the ocean temperature in October in New Castle?

In New Castle, Delaware, in October, the average water temperature is 64.6°F (18.1°C). Swimming in 64.6°F (18.1°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

In October, the average day length is 11h and 8min.

What time are sunrise and sunset in October in New Castle?

On the first day of October in New Castle, sunrise is at 6:59 am and sunset at 6:44 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 6:01 pm EDT.

How long on average sun shines in October in New Castle?

The average sunshine duration in October in New Castle is 5.7h.

What is the UV index reading in October in New Castle?

In October, the average daily maximum UV index in New Castle is 4. A UV Index value of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASOctoberND
Sep
October
Nov
Average high temperature
76.3°F 24.6°C
64.8°F 18.2°C
53.2°F 11.8°C
Average low temperature
60.6°F 15.9°C
50.4°F 10.2°C
39.6°F 4.2°C
Average pressure
30.05" 763mmHg
30.03" 763mmHg
30.13" 765mmHg
Average wind speed
6mph 9.7km/h
7.4mph 11.9km/h
7.8mph 12.6km/h
Average max. wind speed
6.2mph 10km/h
8mph 12.9km/h
8.5mph 13.7km/h
Average wind speed gusts
9.3mph 15km/h
11.7mph 18.8km/h
12.6mph 20.3km/h
Average humidity
77%
78%
74%
Average rainfall
1.42" 36mm
1.61" 41mm
1.42" 36mm
Average rainfall days
11.2
10.5
8
Average snowfall
0" 0mm
0" 0mm
0.2" 5mm
Average snowfall days
0
0
0.4
Average sea temperature
72.1°F 22.3°C
64.5°F 18.1°C
55.5°F 13.1°C
Average daylight
12h 2min
11h 1min
10h 0min
Average sunshine
9h 1min
5h 4min
5h 5min
Average sunshine days
17.6
18.7
20.1
Average UV index
5
4
2
Average cloud cover
35%
39%
36%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in October
New Castle, DE

Average temperature in October - New Castle, DE
  • Average high temperature in October: 64.8°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.8°F).

  • Average low temperature in October: 50.4°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in October
New Castle, DE

Average pressure in October - New Castle, DE
  • Average pressure in October: 30.03"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in October
New Castle, DE

Average wind speed in October - New Castle, DE
  • Average wind speed in October: 7.4mph

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in October
New Castle, DE

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

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in October
New Castle, DE

Average rainfall in October - New Castle, DE
  • Average rainfall in October: 1.61"

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is January (1.38").

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Average rainfall days in October
New Castle, DE

Average rainfall days in October - New Castle, DE
  • Average rainfall days in October: 10.5 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7.8 days).

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Average snowfall in October
New Castle, DE

Average snowfall in October - New Castle, DE
  • Average snowfall in October: 0"

The month with the highest snowfall is January (1.69").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in October
New Castle, DE

Average snowfall days in October - New Castle, DE
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in October
New Castle, DE

Average sea temperature in October - New Castle, DE
  • Average sea temperature in October: 64.5°F

The best month for swimming (with the highest average sea temperature) is August (76.3°F).
The coldest month (with the lowest average sea temperature) is February (40.9°F).

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

Average daylight in October / Average sunshine in October - New Castle, DE
  • Average daylight in October: 11h and 1min

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 October: 5h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in October
New Castle, DE

Average sunshine days in October - New Castle, DE
  • Average sunshine days in October: 18.7 days

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in October
New Castle, DE

Average UV index in October - New Castle, DE
  • Average UV index in October: 4

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

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Average cloud cover in October
New Castle, DE

Average cloud cover in October - New Castle, DE
  • Average cloud cover in October: 39

The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in October
New Castle, DE

Average visibility in October - New Castle, DE
  • 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).

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New Castle, Delaware, USA

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