As of 10:42 BST

Weather in Grendon Underwood

+10°

Grendon Underwood, Thursday, 8 October, 10:42

Clear sky. Feels like 9°C. High 13°C, low 7°C.

Pressure1022 mb

Wind11 mph NW

Humidity77%

Visibility6.2 mi

Dew point6°C

Detailed hourly forecast

The month ahead in Grendon Underwood: daytime temperatures averaging +14.5° and +8.6° overnight — that is 0.6° above the climate average for October. Rain is expected on 6 days (around 28 mm), against a normal of 5 days and 33 mm. The warmest day should be 13 October (+19.8°), the coolest 17 October (+3.8°).

+14.5°/+8.6°

Average day / night

+0.6°

Above average

6 / 5

Wet days / normal

28 mm

Rainfall this month

Ten-day blocks against the climate average

Period	Forecast (day)	Average	Difference
8 October – 17 October	+14.8°	+14.4°	+0.4°
18 October – 27 October	+14°	+13.1°	+0.9°
28 October – 6 November	near average	+11.7°	—

October records over 66 years

+26°1 October 2011All-time high

-2.8°16 October 1993All-time low

Climate averages and records are calculated from the nearest reference point — Bicester (10 km away).

Fri, 09+9 ° /17 °

1.3

+17 °

Grendon Underwood, Friday, 9 October

Light rain. High 17°C, low 9°C.

Pressure1011 mb

Wind23 mph W

Humidity69%

Visibility6.2 mi

Dew point13°C

Sat, 10+9 ° /14 °

+14 °

Grendon Underwood, Saturday, 10 October

Partly cloudy. High 14°C, low 9°C.

Pressure1014 mb

Wind16 mph W

Humidity58%

Visibility6.2 mi

Dew point5°C

Sun, 11+7 ° /14 °

+14 °

Grendon Underwood, Sunday, 11 October

Overcast. High 14°C, low 7°C.

Pressure1014 mb

Wind7 mph W

Humidity66%

Visibility6.2 mi

Dew point7°C

Mon, 12+8 ° /16 °

1.7

+16 °

Grendon Underwood, Monday, 12 October

Light rain. High 16°C, low 8°C.

Pressure1016 mb

Wind13 mph S

Humidity84%

Visibility—

Dew point12°C

Tue, 13+15 ° /20 °

1.3

+20 °

Grendon Underwood, Tuesday, 13 October

Light rain. High 20°C, low 15°C.

Pressure1022 mb

Wind13 mph SW

Humidity80%

Visibility—

Dew point16°C

Wed, 14+10 ° /17 °

+17 °

Grendon Underwood, Wednesday, 14 October

Overcast. High 17°C, low 10°C.

Pressure1022 mb

Wind12 mph SW

Humidity54%

Visibility—

Dew point7°C

Thu, 15+8 ° /12 °

7.1

+12 °

Grendon Underwood, Thursday, 15 October

Rain. High 12°C, low 8°C.

Pressure1020 mb

Wind22 mph NW

Humidity84%

Visibility—

Dew point7°C

Fri, 16+5 ° /12 °

+12 °

Grendon Underwood, Friday, 16 October

Clear sky. High 12°C, low 5°C.

Pressure1022 mb

Wind10 mph NW

Humidity54%

Visibility—

Dew point2°C

Sat, 17+4 ° /13 °

+13 °

Grendon Underwood, Saturday, 17 October

Clear sky. High 13°C, low 4°C.

Pressure1015 mb

Wind12 mph N

Humidity62%

Visibility—

Dew point4°C

Sun, 18+9 ° /14 °

3.9

+14 °

Grendon Underwood, Sunday, 18 October

Light rain. High 14°C, low 9°C.

Pressure1014 mb

Wind12 mph N

Humidity95%

Visibility—

Dew point12°C

Mon, 19+9 ° /13 °

11.3

+13 °

Grendon Underwood, Monday, 19 October

Rain. High 13°C, low 9°C.

Pressure1024 mb

Wind19 mph E

Humidity68%

Visibility—

Dew point7°C

Tue, 20+9 ° /15 °

+15 °

Grendon Underwood, Tuesday, 20 October

Overcast. High 15°C, low 9°C.

Pressure1020 mb

Wind15 mph E

Humidity78%

Visibility—

Dew point10°C

Wed, 21+11 ° /14 °

0.5

+14 °

Grendon Underwood, Wednesday, 21 October

Light rain. High 14°C, low 11°C.

Pressure1016 mb

Wind11 mph NE

Humidity82%

Visibility—

Dew point11°C

Thu, 22+11 ° /14 °

+14 °

Grendon Underwood, Thursday, 22 October

Overcast. High 14°C, low 11°C.

Pressure1022 mb

Wind11 mph N

Humidity64%

Visibility—

Dew point6°C

Fri, 23+9 ° /14 °

+14 °

Grendon Underwood, Friday, 23 October

Overcast. High 14°C, low 9°C.

Pressure1029 mb

Wind14 mph N

Humidity60%

Visibility—

Dew point6°C

Days 17 onward are based on 60-year climate statistics

Sat, 24+7 ° /13 °

2.3

+13 °

Grendon Underwood, Saturday, 24 October

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

Average high13°C

Average low7°C

Average rainfall2.3 mm

Chance of rain40%

Warmest on record+18° (2017)

Coldest on record-1° (1964)

Sun, 25+7 ° /13 °

1.3

+13 °

Grendon Underwood, 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 rain33%

Warmest on record+17° (2013)

Coldest on record-1° (1987)

Mon, 26+7 ° /13 °

1.4

+13 °

Grendon Underwood, Monday, 26 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 rain27%

Warmest on record+18° (2022)

Coldest on record-1° (1997)

Tue, 27+7 ° /13 °

1.7

+13 °

Grendon Underwood, Tuesday, 27 October

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

Average high13°C

Average low7°C

Average rainfall1.7 mm

Chance of rain37%

Warmest on record+19° (2005)

Coldest on record-2° (1962)

Wed, 28+7 ° /13 °

+13 °

Grendon Underwood, 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 rain38%

Warmest on record+18° (2014)

Coldest on record+1° (1997)

Thu, 29+7 ° /12 °

1.3

+12 °

Grendon Underwood, Thursday, 29 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 rain32%

Warmest on record+20° (2022)

Coldest on record-3° (1997)

Fri, 30+7 ° /12 °

1.8

+12 °

Grendon Underwood, Friday, 30 October

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

Average high12°C

Average low7°C

Average rainfall1.8 mm

Chance of rain32%

Warmest on record+19° (2001)

Coldest on record-2° (1997)

Sat, 31+7 ° /12 °

2.4

+12 °

Grendon Underwood, Saturday, 31 October

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

Average high12°C

Average low7°C

Average rainfall2.4 mm

Chance of rain35%

Warmest on record+20° (2014)

Coldest on record-2° (2018)

Sun, 01+7 ° /12 °

+12 °

Grendon Underwood, Sunday, 1 November

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

Average high12°C

Average low7°C

Average rainfall2 mm

Chance of rain40%

Warmest on record+17° (1999)

Coldest on record-2° (1988)

Mon, 02+7 ° /12 °

3.4

+12 °

Grendon Underwood, Monday, 2 November

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

Average high12°C

Average low7°C

Average rainfall3.4 mm

Chance of rain35%

Warmest on record+17° (2005)

Coldest on record0° (1985)

Tue, 03+6 ° /11 °

1.5

+11 °

Grendon Underwood, Tuesday, 3 November

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

Average high11°C

Average low6°C

Average rainfall1.5 mm

Chance of rain33%

Warmest on record+16° (2025)

Coldest on record-2° (1985)

Wed, 04+6 ° /11 °

2.1

+11 °

Grendon Underwood, Wednesday, 4 November

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

Average high11°C

Average low6°C

Average rainfall2.1 mm

Chance of rain37%

Warmest on record+16° (2025)

Coldest on record-3° (1966)

Thu, 05+5 ° /11 °

1.7

+11 °

Grendon Underwood, Thursday, 5 November

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

Average high11°C

Average low5°C

Average rainfall1.7 mm

Chance of rain30%

Warmest on record+16° (2025)

Coldest on record-2° (1988)

Fri, 06+5 ° /11 °

1.7

+11 °

Grendon Underwood, Friday, 6 November

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

Average high11°C

Average low5°C

Average rainfall1.7 mm

Chance of rain33%

Warmest on record+17° (2025)

Coldest on record0° (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 Grendon Underwood 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 Grendon Underwood 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.