Horten
Norway
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Horten, Norway

In Horten, Norway, in January, the average water temperature is 4°C (39.2°F). Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in January »

In February, the average sea temperature in Horten, Norway, is 3.3°C (37.9°F). Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. Weather in February »

The month with the coldest seawater in Horten, Norway, is March, with an average sea temperature of 2.8°C (37°F). Note: For swimming, this is considered very dangerous and immediately life-threatening. Weather in March »

In Horten, Norway, the average seawater temperature in April is 6.4°C (43.5°F). Note: Swimming in 6.4°C (43.5°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique. Weather in April »

In May, the average sea temperature in Horten, Norway, is 11.3°C (52.3°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in May »

In June, the average sea temperature in Horten, Norway, is 15.3°C (59.5°F). Note: Swimming in 15.3°C (59.5°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F). Weather in June »

In Horten, Norway, the average seawater temperature in July is 17.8°C (64°F). Note: For most, swimming in 17.8°C (64°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F). Weather in July »

August is the month with the warmest seawater in Horten, Norway, with an average sea temperature of 18.4°C (65.1°F). Note: For most, swimming in 18.4°C (65.1°F) is not an enjoyable activity. Weather in August »

In Horten, Norway, the average seawater temperature in September is 15.8°C (60.4°F). Note: For swimming, a surface water temperature of 15.8°C (60.4°F) is not enjoyable for the majority. Weather in September »

In Horten, Norway, the average seawater temperature in October is 12.1°C (53.8°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in October »

In Horten, Norway, in November, the average water temperature is 9.2°C (48.6°F). Note: Swimming in 9.2°C (48.6°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation. Weather in November »

In December, the average sea temperature in Horten, Norway, is 6.3°C (43.3°F). Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Weather in December »

When is the sea coldest in Horten?

March is the month with the coldest seawater, with an average sea temperature of 2.8°C (37°F).

When are the longest days in Horten?

With an average of 18.5h of daylight, June has the longest days of the year in Horten.

What month is the sea warmest in Horten?

With an average sea temperature of 18.4°C (65.1°F), August is the month with the warmest seawater in Horten.

What is the month with the shortest days in Horten?

December has the shortest days of the year in Horten, Norway, with an average of 6.2h of daylight.
Average sea temperature - Horten, Norway

The best month for swimming (with the highest average sea temperature) is August (18.4°C).
The coldest month (with the lowest average sea temperature) is March (2.8°C).

Average daylight - Horten, Norway

The month with the longest days is June (Average daylight: 18.5h).
The month with shortest days is December (Average daylight: 6.2h).