As of 00:47 BST

Weather in Welwyn

+8°

Welwyn, Thursday, 8 October, 00:47

Clear sky. Feels like 4°C. High 13°C, low 6°C.

Pressure1016 mb

Wind14 mph NW

Humidity87%

Visibility6.2 mi

Dew point6°C

Detailed hourly forecast

The month ahead in Welwyn: daytime temperatures averaging +14.7° and +7.9° overnight — that is 0.7° above the climate average for October. Rain is expected on 5 days (around 20 mm), against a normal of 5 days and 31 mm. The warmest day should be 9 October (+18.7°), the coolest 23 October (+3.4°).

+14.7°/+7.9°

Average day / night

+0.7°

Above average

5 / 5

Wet days / normal

20 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+15.9°	+14.4°	+1.5°
18 October – 27 October	+12.6°	+13.2°	-0.5°
28 October – 6 November	near average	+11.7°	—

October records over 66 years

+25.6°1 October 2011All-time high

-2.5°29 October 2008All-time low

Climate averages and records are calculated from the nearest reference point — Codicote (2.6 km away).

Fri, 09+9 ° /19 °

2.4

+19 °

Welwyn, Friday, 9 October

Light rain. High 19°C, low 9°C.

Pressure1011 mb

Wind21 mph SW

Humidity72%

Visibility6.2 mi

Dew point13°C

Sat, 10+9 ° /14 °

+14 °

Welwyn, Saturday, 10 October

Overcast. High 14°C, low 9°C.

Pressure1013 mb

Wind15 mph W

Humidity57%

Visibility6.2 mi

Dew point5°C

Sun, 11+7 ° /14 °

+14 °

Welwyn, Sunday, 11 October

Mainly clear. High 14°C, low 7°C.

Pressure1014 mb

Wind10 mph W

Humidity60%

Visibility6.2 mi

Dew point5°C

Mon, 12+6 ° /16 °

+16 °

Welwyn, Monday, 12 October

Overcast. High 16°C, low 6°C.

Pressure1019 mb

Wind13 mph S

Humidity64%

Visibility—

Dew point8°C

Tue, 13+11 ° /18 °

1.6

+18 °

Welwyn, Tuesday, 13 October

Light rain. High 18°C, low 11°C.

Pressure1020 mb

Wind13 mph SW

Humidity87%

Visibility—

Dew point15°C

Wed, 14+9 ° /17 °

+17 °

Welwyn, Wednesday, 14 October

Partly cloudy. High 17°C, low 9°C.

Pressure1026 mb

Wind7 mph SW

Humidity47%

Visibility—

Dew point4°C

Thu, 15+10 ° /17 °

0.1

+17 °

Welwyn, Thursday, 15 October

Light rain. High 17°C, low 10°C.

Pressure1019 mb

Wind14 mph SW

Humidity59%

Visibility—

Dew point7°C

Fri, 16+7 ° /15 °

+15 °

Welwyn, Friday, 16 October

Overcast. High 15°C, low 7°C.

Pressure1020 mb

Wind7 mph N

Humidity55%

Visibility—

Dew point4°C

Sat, 17+9 ° /15 °

3.3

+15 °

Welwyn, Saturday, 17 October

Light rain. High 15°C, low 9°C.

Pressure1010 mb

Wind19 mph S

Humidity79%

Visibility—

Dew point10°C

Sun, 18+5 ° /12 °

+12 °

Welwyn, Sunday, 18 October

Overcast. High 12°C, low 5°C.

Pressure1027 mb

Wind11 mph W

Humidity46%

Visibility—

Dew point-1°C

Mon, 19+9 ° /15 °

7.7

+15 °

Welwyn, Monday, 19 October

Rain. High 15°C, low 9°C.

Pressure1006 mb

Wind21 mph SW

Humidity92%

Visibility—

Dew point12°C

Tue, 20+12 ° /17 °

0.8

+17 °

Welwyn, Tuesday, 20 October

Light rain. High 17°C, low 12°C.

Pressure1013 mb

Wind21 mph W

Humidity76%

Visibility—

Dew point11°C

Wed, 21+8 ° /13 °

0.7

+13 °

Welwyn, Wednesday, 21 October

Light rain. High 13°C, low 8°C.

Pressure1007 mb

Wind21 mph W

Humidity54%

Visibility—

Dew point3°C

Thu, 22+6 ° /10 °

+10 °

Welwyn, Thursday, 22 October

Light rain. High 10°C, low 6°C.

Pressure994 mb

Wind20 mph W

Humidity67%

Visibility—

Dew point4°C

Fri, 23+3 ° /9 °

+9 °

Welwyn, Friday, 23 October

Mainly clear. High 9°C, low 3°C.

Pressure1001 mb

Wind19 mph NW

Humidity56%

Visibility—

Dew point0°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+7 ° /13 °

1.9

+13 °

Welwyn, Saturday, 24 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall1.9 mm

Chance of rain35%

Warmest on record+18° (2017)

Coldest on record0° (1964)

Sun, 25+7 ° /13 °

1.3

+13 °

Welwyn, Sunday, 25 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall1.3 mm

Chance of rain27%

Warmest on record+17° (2013)

Coldest on record0° (1997)

Mon, 26+7 ° /13 °

1.2

+13 °

Welwyn, Monday, 26 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall1.2 mm

Chance of rain25%

Warmest on record+18° (2022)

Coldest on record+0° (1997)

Tue, 27+7 ° /13 °

1.4

+13 °

Welwyn, Tuesday, 27 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall1.4 mm

Chance of rain35%

Warmest on record+19° (2022)

Coldest on record-1° (1962)

Wed, 28+7 ° /13 °

+13 °

Welwyn, Wednesday, 28 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall2 mm

Chance of rain40%

Warmest on record+18° (2005)

Coldest on record+1° (2012)

Thu, 29+7 ° /12 °

1.2

+12 °

Welwyn, Thursday, 29 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall1.2 mm

Chance of rain28%

Warmest on record+20° (2022)

Coldest on record-2° (2008)

Fri, 30+7 ° /12 °

1.3

+12 °

Welwyn, Friday, 30 October

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall1.3 mm

Chance of rain23%

Warmest on record+19° (2001)

Coldest on record-2° (1997)

Sat, 31+7 ° /13 °

+13 °

Welwyn, Saturday, 31 October

Climate average for this date — the mean of the last 60 years.

Average high13°C

Average low7°C

Average rainfall2 mm

Chance of rain40%

Warmest on record+20° (2014)

Coldest on record-2° (1997)

Sun, 01+7 ° /12 °

2.1

+12 °

Welwyn, Sunday, 1 November

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall2.1 mm

Chance of rain40%

Warmest on record+17° (1999)

Coldest on record-1° (1988)

Mon, 02+7 ° /12 °

2.8

+12 °

Welwyn, Monday, 2 November

Climate average for this date — the mean of the last 60 years.

Average high12°C

Average low7°C

Average rainfall2.8 mm

Chance of rain35%

Warmest on record+17° (2005)

Coldest on record+0° (1985)

Tue, 03+6 ° /11 °

1.4

+11 °

Welwyn, Tuesday, 3 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low6°C

Average rainfall1.4 mm

Chance of rain30%

Warmest on record+16° (1996)

Coldest on record-2° (1985)

Wed, 04+6 ° /11 °

2.5

+11 °

Welwyn, Wednesday, 4 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low6°C

Average rainfall2.5 mm

Chance of rain33%

Warmest on record+16° (2010)

Coldest on record-2° (1966)

Thu, 05+5 ° /11 °

1.3

+11 °

Welwyn, Thursday, 5 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low5°C

Average rainfall1.3 mm

Chance of rain27%

Warmest on record+17° (2025)

Coldest on record-3° (1988)

Fri, 06+6 ° /11 °

2.2

+11 °

Welwyn, Friday, 6 November

Climate average for this date — the mean of the last 60 years.

Average high11°C

Average low6°C

Average rainfall2.2 mm

Chance of rain35%

Warmest on record+16° (2025)

Coldest on record+0° (2014)

Questions about the month ahead

How accurate is a month-long forecast?

The first 16 days come from weather models — highly reliable for the first 3–5 days, gradually less so after that. Days 17 to 30 for Welwyn are built from climate averages over the last 60 years, so they show typical weather for those dates rather than a specific forecast.

What does "above average" mean?

We compare the forecast with the climate average for exactly the same calendar days, calculated from 60 years of observations. The difference shows how the coming month compares with a typical one.

Where do the 66-year records come from?

These are real historical extremes recorded in Welwyn since 1960: the highest and lowest temperature for each calendar date, with the year it happened.

How often is the 30-day forecast updated?

The forecast portion refreshes every hour. The climate portion is based on long-term data and stays stable.