December weather forecastIsahara, Madagascar

December

Weather in December

December, the first month of the summer in Isahara, is still a warm month, with an average temperature fluctuating between 28.5°C (83.3°F) and 24.1°C (75.4°F).

Temperature

Isahara's average high-temperature in December sits at a still moderately hot 28.5°C (83.3°F), showing little difference from the previous month. Isahara in December observes a slight diminution in temperature from daily highs, recording a low-temperature average of 24.1°C (75.4°F).

Heat index

In December, the heat index is computed to be a tropical 33°C (91.4°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.

Humidity

In December, the average relative humidity in Isahara is 79%.

Rainfall

In December, in Isahara, the rain falls for 21 days. Throughout December, 89mm (3.5") of precipitation is accumulated. In Isahara, during the entire year, the rain falls for 217.3 days and collects up to 880mm (34.65") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 36min of daylight.
On the first day of the month, sunrise is at 04:54 and sunset at 18:24. On the last day of December, sunrise is at 05:06 and sunset at 18:40 EAT.

Sunshine

December has the most sunshine of the year in Isahara, with an average of 9.7h of sunshine.

UV index

January, February and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 7 in December translates into these instructions:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Updated: Feb 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

During December, Isahara experiences an average high-temperature of 28.5°C (83.3°F) and a low-temperature of 24.1°C (75.4°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in December is computed to be 33°C (91.4°F).

The average relative humidity in December is 79%.

In Isahara, Madagascar, in December, it is raining for 21 days, with typically 89mm (3.5") of accumulated precipitation.

The month with the longest days is December, with an average of 13h and 36min of daylight.

In December, the average day length in Isahara, Madagascar, is 13h and 34min.

In December, on the first day of the month, sunrise is at 04:54 and sunset at 18:24. On the last day of the month, in Isahara, sunrise is at 05:06 and sunset at 18:40 EAT.

December has the most sunshine of the year in Isahara, Madagascar, with an average of 9.7h of sunshine.

The average sunshine duration in December is 9.7h.

January, February and December, with an average maximum UV index of 7, are months with the highest UV index.

In Isahara, Madagascar, the average daily maximum UV index in December is 7. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

26.9°C

28.5°C

28.7°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

17.4km/h

16km/h

14.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

10.3

6.7

6.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Isahara, Madagascar

Average high temperature in December: 28.5°C

The warmest month (with the highest average high temperature) is January (28.7°C).
The month with the lowest average high temperature is July (22.8°C).

Average low temperature in December: 24.1°C

The month with the highest average low temperature is January (24.3°C).
The coldest month (with the lowest average low temperature) is July (18.4°C).

Average pressure in December
Isahara, Madagascar

Average pressure in December: 1013.4mbar

The month with the highest atmospheric pressure is July (1022.6mbar).
The month with the lowest atmospheric pressure is January (1011.9mbar).

Average wind speed in December
Isahara, Madagascar

Average wind speed in December: 14.9km/h

The windiest month (with the highest average wind speed) is October (17.1km/h).
The calmest month (with the lowest average wind speed) is May (11km/h).

Average humidity in December
Isahara, Madagascar

Average humidity in December: 79%

The month with the highest relative humidity is March (82%).
The months with the lowest relative humidity are July, August and September (78%).

Average rainfall in December
Isahara, Madagascar

Average rainfall in December: 89mm

The wettest month (with the highest rainfall) is January (151mm).
The driest month (with the least rainfall) is September (24mm).

Average rainfall days in December
Isahara, Madagascar

Average rainfall days in December: 21 days

The month with the highest number of rainy days is January (22 days).
The month with the least rainy days is September (12.2 days).

Average daylight in December /
Average sunshine in December
Isahara, Madagascar

Average daylight in December: 13h and 36min

The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).

Average sunshine in December: 9h and 42min

The month with the most sunshine is December (Average sunshine: 9h and 42min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).

Average sunshine days in December
Isahara, Madagascar

Average sunshine days in December: 6.7 days

The month with the most sunshine days is September (12.9 days).
The month with the least sunshine days is January (6.3 days).

Average UV index in December
Isahara, Madagascar

Average UV index in December: 7

The months with the highest UV index are January, February and December (UV index 7).
The months with the lowest UV index are March, April, May, June, July, August, September, October and November (UV index 6).

Average cloud cover in December
Isahara, Madagascar

Average cloud cover in December: 44

The months with the most cloud cover are March and November (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in December
Isahara, Madagascar

Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).