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Climate comparison

Sri Lanka

United States

Sri Lanka
All information: Sri Lanka
United States of America
All information: United States
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Sri LankaUnited States
Climate zoneTropicsSubpolar zone to Tropics
Latitudes9° 49' N to 5° 57' N64° 51' N to 19° 30' N
Distance to equator700 - 1,100 km2,200 - 7,200 km
 
Annual valuesSri LankaUnited States
Ø Daytime maximum temperature29.70 °C18.80 °C
Ø Daily low temperature21.70 °C7.2 °C
Ø Water temperature27.70 °C17.70 °C
Ø Humidity80 %67 %
Precipitation1,869 mm934 mm
Rain days138.0 days85.2 days
Hours of sunshine2,154 hrs.2,628 hrs.

Colors of the following climate diagrams:
Sri Lanka
United States

Daily maximum temperatures

The highest daytime temperatures in Sri Lanka are reached in March with an average of 31.2 °C. The coldest month, on the other hand, is December, with an average of just 28.0 °C. In the United States, July is the warmest month, with 30.8 °C. There, it is coolest in January with an average of 6.0 °C.

Night time lows

At night, it cools down to varying degrees depending on the country and altitude. In Sri Lanka, temperatures drop as low as 19.9 °C in January. The warmest nights are in June at 23.2 °C. In the United States, it is coolest at night in January at -4.1 °C and warmest in July at 18.8 °C. This corresponds to a cooling of 6.6 to 10.1 °C in Sri Lanka and 9.8 to 12.4 °C in the United States.

Water temperatures

Humidity

The humidity of the air depends to a large extent on the air temperature. The warmer the air, the more water it can absorb. At a temperature of 25°C it is 23 grams per cubic meter, at 30 degrees it is already 26 grams. Therefore, the air humidity is given as a relative value to the temperature-dependent maximum amount. It becomes unpleasant when high humidity is combined with high temperatures.

Humidex

Humidex is an approximate, sensed temperature calculated on the basis of air temperature, dew point and humidity. It was developed in 1965 by the Canadian meteorologists J. M. Masterton and F. A. Richardson. Since the wind speed is ignored here, it is not very meaningful in areas below approx. 15°C. Above that, it is more reliable, since at higher temperatures humidity plays a greater role than wind.

Rainy days per month

By definition, a rainy day is a day on which at least 0.1 liters of precipitation per m² fall. This corresponds to a 1 square meter puddle in which the water stands 0.1 mm high — insofar as the water does not seep away or evaporate. So it does not have to rain all day long. November brings the most rainy days (18.1) in Sri Lanka. With an average of only 5.2 days, February is the friendliest. In the United States, it rains most often in May with 8.3 days.

Precipitation amount per day

Depending on the season and the location of a country, the wind brings a varying amount of water with it. As a rule, the water evaporating in the oceans is absorbed and then transported inland. The greatest amount of rain (hail or dew are also forms of precipitation) in Sri Lanka occurs in November, when about 10.5 liters per square meter fall per day. In the United States, the average amount of precipitation ranges from 1.9 liters per day in January to 3.1 in June. However, these are average values. If you consider that there are only 18.1 rainy days in Sri Lanka in November, each of them accounts for about 17.3 liters.

Sunshine hours per day

With 2,628 hours of sunshine per year, the United States is in the lead. The most hours of sunshine (9.7 per day) are in July. Sri Lanka falls into second place with only 2,154 hours. There the sun is visible in September for only 4.2 hours per day, so not hidden behind clouds.

Hours of daylight

The length of a day varies throughout the year and depends on the distance from the equator. In December, the day in Sri Lanka is only 11.7 hours long. In June, on the other hand, it is 12.6 hours. In the United States, it is 9.2 hours in December and 15.3 in June.
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