Grangemouth weather
The Grangemouth weather guide shows monthly weather averages (including daytime and night-time temperatures, rainfall and hours of sunshine) for holidays in Grangemouth, Falkirk Area, Scotland in 2026/2027.
Grangemouth weather averages
Check the Grangemouth weather averages for each month of the year including maximum daytime and minimum night-time temperatures, monthly rainfall, number of days with rain and average daily hours of sunshine for Grangemouth, Falkirk Area, Scotland.
Grangemouth weather by month
Check the weather for Grangemouth, Falkirk Area, Scotland for a particular month by selecting from the list below. This gives the best indication of what to expect from the weather months in advance.
Grangemouth weather in January
The average maximum daytime temperature in Grangemouth in January is a cold 5°C (41°F), while the average minimum night-time temperature is a cold -0°C (32°F). You can expect on average 1 hours of sunshine a day in Grangemouth during January.
- 5°C max day temperature
5 - 1 hour of sunshine per day
1 - 21 days with some rainfall
21 - -0°C min night temperature
-0 - 155 mm of monthly rainfall
155
On average 155 mm (6.1 inches) of rain normally falls in Grangemouth during January with rain falling on 21 days of the month.
Grangemouth weather in February
The average maximum daytime temperature in Grangemouth in February is a cold 5°C (41°F), while the average minimum night-time temperature is a cold -0°C (32°F). You can expect on average 2 hours of sunshine a day in Grangemouth during February.
- 5°C max day temperature5
- 2 hours of sunshine per day
2 - 17 days with some rainfall
17 - -0°C min night temperature-0
- 111 mm of monthly rainfall
111
On average 111 mm (4.4 inches) of rain normally falls in Grangemouth during February with rain falling on 17 days of the month.
Grangemouth weather in March
The average maximum daytime temperature in Grangemouth in March is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 1°C (34°F). You can expect on average 3 hours of sunshine a day in Grangemouth during March.
- 8°C max day temperature
8 - 3 hours of sunshine per day
3 - 20 days with some rainfall20
- 1°C min night temperature1
- 119 mm of monthly rainfall119
On average 119 mm (4.7 inches) of rain normally falls in Grangemouth during March with rain falling on 20 days of the month.
Grangemouth weather in April
The average maximum daytime temperature in Grangemouth in April is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 5 hours of sunshine a day in Grangemouth during April.
- 11°C max day temperature11
- 5 hours of sunshine per day
5 - 16 days with some rainfall16
- 2°C min night temperature2
- 70 mm of monthly rainfall
70
On average 70 mm (2.8 inches) of rain normally falls in Grangemouth during April with rain falling on 16 days of the month.
Grangemouth weather in May
The average maximum daytime temperature in Grangemouth in May is a comfortable 14°C (57°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 5 hours of sunshine a day in Grangemouth during May.
- 14°C max day temperature
14 - 5 hours of sunshine per day5
- 16 days with some rainfall16
- 5°C min night temperature5
- 78 mm of monthly rainfall78
On average 78 mm (3.1 inches) of rain normally falls in Grangemouth during May with rain falling on 16 days of the month.
Grangemouth weather in June
The average maximum daytime temperature in Grangemouth in June is a comfortable 16°C (61°F), while the average minimum night-time temperature is a cool 8°C (46°F). You can expect on average 6 hours of sunshine a day in Grangemouth during June.
- 16°C max day temperature
16 - 6 hours of sunshine per day
6 - 15 days with some rainfall
15 - 8°C min night temperature8
- 75 mm of monthly rainfall75
On average 75 mm (3 inches) of rain normally falls in Grangemouth during June with rain falling on 15 days of the month.
Grangemouth weather in July
The average maximum daytime temperature in Grangemouth in July is a comfortable 19°C (66°F), while the average minimum night-time temperature is a cool 10°C (50°F). You can expect on average 5 hours of sunshine a day in Grangemouth during July.
- 19°C max day temperature
19 - 5 hours of sunshine per day5
- 16 days with some rainfall16
- 10°C min night temperature10
- 78 mm of monthly rainfall78
On average 78 mm (3.1 inches) of rain normally falls in Grangemouth during July with rain falling on 16 days of the month.
Grangemouth weather in August
The average maximum daytime temperature in Grangemouth in August is a comfortable 18°C (64°F), while the average minimum night-time temperature is a cool 9°C (48°F). You can expect on average 5 hours of sunshine a day in Grangemouth during August.
- 18°C max day temperature18
- 5 hours of sunshine per day5
- 16 days with some rainfall16
- 9°C min night temperature9
- 95 mm of monthly rainfall
95
On average 95 mm (3.7 inches) of rain normally falls in Grangemouth during August with rain falling on 16 days of the month.
Grangemouth weather in September
The average maximum daytime temperature in Grangemouth in September is a comfortable 15°C (59°F), while the average minimum night-time temperature is a cold 7°C (45°F). You can expect on average 4 hours of sunshine a day in Grangemouth during September.
- 15°C max day temperature15
- 4 hours of sunshine per day
4 - 18 days with some rainfall18
- 7°C min night temperature7
- 121 mm of monthly rainfall
121
On average 121 mm (4.8 inches) of rain normally falls in Grangemouth during September with rain falling on 18 days of the month.
Grangemouth weather in October
The average maximum daytime temperature in Grangemouth in October is a cool 11°C (52°F), while the average minimum night-time temperature is a cold 5°C (41°F). You can expect on average 3 hours of sunshine a day in Grangemouth during October.
- 11°C max day temperature11
- 3 hours of sunshine per day3
- 20 days with some rainfall20
- 5°C min night temperature5
- 135 mm of monthly rainfall135
On average 135 mm (5.3 inches) of rain normally falls in Grangemouth during October with rain falling on 20 days of the month.
Grangemouth weather in November
The average maximum daytime temperature in Grangemouth in November is a cool 8°C (46°F), while the average minimum night-time temperature is a cold 2°C (36°F). You can expect on average 2 hours of sunshine a day in Grangemouth during November.
- 8°C max day temperature8
- 2 hours of sunshine per day2
- 20 days with some rainfall20
- 2°C min night temperature2
- 143 mm of monthly rainfall143
On average 143 mm (5.6 inches) of rain normally falls in Grangemouth during November with rain falling on 20 days of the month.
Grangemouth weather in December
The average maximum daytime temperature in Grangemouth in December is a cold 6°C (43°F), while the average minimum night-time temperature is a cold 0°C (32°F). You can expect on average 1 hours of sunshine a day in Grangemouth during December.
- 6°C max day temperature6
- 1 hour of sunshine per day1
- 20 days with some rainfall20
- 0°C min night temperature0
- 142 mm of monthly rainfall142
On average 142 mm (5.6 inches) of rain normally falls in Grangemouth during December with rain falling on 20 days of the month.