Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
With average high temperatures of 4.9°C (40.8°F) and lows of 1.4°C (34.5°F), January is the coldest month.Humidity
The average relative humidity in January in Dumbarton is 89%.Rainfall
In January, the rain falls for 20.2 days. Throughout January, 72mm (2.83") of precipitation is accumulated. In Dumbarton, during the entire year, the rain falls for 242.3 days and collects up to 788mm (31.02") of precipitation.Snowfall
January through April, November and December are months with snowfall. In Dumbarton, during January, snow falls for 3.8 days and regularly aggregates up to 32mm (1.26") of snow. In Dumbarton, during the entire year, snow falls for 13 days and aggregates up to 127mm (5") of snow.Sea temperature
In Dumbarton, United Kingdom, in January, the average water temperature is 8.3°C (46.9°F).Note: Swimming in 8.3°C (46.9°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.
Daylight
In January, the average length of the day is 7h and 44min.On the first day of the month, sunrise is at 8:48 am and sunset at 3:54 pm. On the last day of January, sunrise is at 8:15 am and sunset at 4:48 pm GMT.
Sunshine
The average sunshine in January in Dumbarton is 3.5h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 2 suggests this advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in Dumbarton?
Is January cold in Dumbarton?
What is the average humidity in January in Dumbarton?
How much does it rain in Dumbarton in January?
How many days does it snow in January in Dumbarton?
What is the water temperature in January in Dumbarton?
What is the average length of the day in January in Dumbarton?
What time are sunrise and sunset in January in Dumbarton?
How long on average sun shines in January in Dumbarton?
What is the month with the lowest UV index in Dumbarton?
What is the UV index reading in January in Dumbarton?
Average temperature in January
Dumbarton, United Kingdom
- Average high temperature in January: 4.9°C
The warmest month (with the highest average high temperature) is July (16.8°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in January: 1.4°C
The month with the highest average low temperature is July (10°C).
The coldest months (with the lowest average low temperature) are January and February (1.4°C).
Average pressure in January
Dumbarton, United Kingdom
- Average pressure in January: 1008.8mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.7mbar).
Average wind speed in January
Dumbarton, United Kingdom
- Average wind speed in January: 18.6km/h
The windiest month (with the highest average wind speed) is January (18.6km/h).
The calmest month (with the lowest average wind speed) is July (12km/h).
Average humidity in January
Dumbarton, United Kingdom
- Average humidity in January: 89%
The months with the highest relative humidity are November and December (90%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in January
Dumbarton, United Kingdom
- Average rainfall in January: 72mm
The wettest month (with the highest rainfall) is December (88mm).
The driest month (with the least rainfall) is April (37mm).
Average rainfall days in January
Dumbarton, United Kingdom
- Average rainfall days in January: 20.2 days
The months with the highest number of rainy days are July and August (23 days).
The month with the least rainy days is February (17.3 days).
Average snowfall in January
Dumbarton, United Kingdom
- Average snowfall in January: 32mm
The month with the highest snowfall is February (49mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in January
Dumbarton, United Kingdom
- Average snowfall days in January: 3.8 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in January
Dumbarton, United Kingdom
- Average sea temperature in January: 8.3°C
The best month for swimming (with the highest average sea temperature) is August (14.3°C).
The coldest month (with the lowest average sea temperature) is March (7.4°C).
Average daylight in January /
Average sunshine in January
Dumbarton, United Kingdom
- Average daylight in January: 7h and 4min
The month with the longest days is June (Average daylight: 17h and 30min).
The month with the shortest days is December (Average daylight: 7h and 6min).
- Average sunshine in January: 3h and 3min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in January
Dumbarton, United Kingdom
- Average sunshine days in January: 6.9 days
The month with the most sunshine days is March (9.4 days).
The month with the least sunshine days is July (5.3 days).
Average UV index in January
Dumbarton, United Kingdom
- Average UV index in January: 2
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in January
Dumbarton, United Kingdom
- Average cloud cover in January: 67
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in January
Dumbarton, United Kingdom
- Average visibility in January: 8km
The months with the highest visibility are February, March, April and May (9km).
The months with the lowest visibility are January, June, July, August, September, October, November and December (8km).
