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Contents
- The climate of Merizo
- The best time to visit Merizo
- The worst time to visit Merizo
- Spring weather in Merizo
- Summer weather in Merizo
- Autumn weather in Merizo
- Winter weather in Merizo
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Merizo
Resting in the geographical region of Guam, USA, Merizo proudly displays a dominant Af climate according to Köppen climate classification. This classification implies the presence of a tropical rainforest climate that is consistent throughout the year. The weather found in this location tends not to waver greatly, providing relatively steady conditions.
The average high temperatures hover between 81.7°F (27.6°C) in February to around 84.7°F (29.3°C) in June and August, while the lows do not deviate excessively either, maintaining an average low between 79.7°F (26.5°C) in February to 83.3°F (28.5°C) in June. This lends the area an overall warm to hot climate all year round with limited variations. In terms of humidity, the relative humidity stays within the range of 76% to 78%.
Merizo experiences a fair amount of rain all year, with the total rainfall ranging from 1.81" (46mm) in March to 10.28" (261mm) in September. Simultaneously, the number of rainfall days varies, but it is noticeably higher between June to December, with up to 28.9 days in July and August. One exceptional weather pattern to notice is the considerably high rainfall from July to September, bringing on the wet season.
Additionally, wind speeds normally fall within the range from 9.6mph (15.4km/h) in August to 16.3mph (26.2km/h) in February. The UV index is consistently at 7 throughout the year.
The average high temperatures hover between 81.7°F (27.6°C) in February to around 84.7°F (29.3°C) in June and August, while the lows do not deviate excessively either, maintaining an average low between 79.7°F (26.5°C) in February to 83.3°F (28.5°C) in June. This lends the area an overall warm to hot climate all year round with limited variations. In terms of humidity, the relative humidity stays within the range of 76% to 78%.
Merizo experiences a fair amount of rain all year, with the total rainfall ranging from 1.81" (46mm) in March to 10.28" (261mm) in September. Simultaneously, the number of rainfall days varies, but it is noticeably higher between June to December, with up to 28.9 days in July and August. One exceptional weather pattern to notice is the considerably high rainfall from July to September, bringing on the wet season.
Additionally, wind speeds normally fall within the range from 9.6mph (15.4km/h) in August to 16.3mph (26.2km/h) in February. The UV index is consistently at 7 throughout the year.
The best time to visit Merizo
Organizing a trip to Merizo yields the best results between April and June. During these months, the weather is generally at its most pleasant. The temperatures range from 82°F (27.8°C) to 84.2°F (29°C) and the humidity is quite tolerable. On top of this, the average sunshine lasts for over 10 hours per day which allows for plenty of time to enjoy outdoor activities.
The worst time to visit Merizo
Although Merizo maintains a consistently warm climate, the period from July to September may prove quite unpleasant for visitors. During these given months, heavy rainfall is common, with total rainfall reaching up to 10.28" (261mm) and rain happening on an average of 28.9 days in a month. This can significantly limit outdoor activities and hamper travel plans.
Spring weather in Merizo
Spring in Merizo, encompassing March to May, is relatively warm and tolerable. Also, the temperature ranges from 82°F (27.8°C) to 84.2°F (29°C). Despite being the drier part of the year, rainfall is still prominent with a variation from 1.81" (46mm) in March gradually increasing to 3.31" (84mm) in May.
Summer weather in Merizo
Summer runs from June to August in Merizo. The temperatures maintain a high between 84.6°F (29.2°C) to 84.7°F (29.3°C) and lows around 82.9°F (28.3°C) to 83.3°F (28.5°C). The total rainfall is generally heavier, scaling from 3.7" (94mm) in June up to an astounding 9.76" (248mm) in August.
Autumn weather in Merizo
Autumn, spanning from September to November, keeps the tradition of warmth in Merizo intact. Temperatures during this period exhibit slight variations with a high between 84.4°F (29.1°C) to 84.2°F (29°C) and a low from 82.8°F (28.2°C) to 82.8°F (28.2°C). Rainfall remains noticeably high during this period, falling from 10.28" (261mm) in September to 4.69" (119mm) in November.
Winter weather in Merizo
Winter in Merizo, December to February, continues to display quite warm temperatures, with the high hovering between 83.5°F (28.6°C) to 81.7°F (27.6°C) and the low from 82°F (27.8°C) to 79.7°F (26.5°C). Rainfall sees a significant drop, with values descending from 2.99" (76mm) in December to 2.28" (58mm) in February. This makes the winter season comparatively drier.
Weather in January
January in Merizo, Guam, typically exhibits a tropical maritime climate, with constant high humidity and temperature. The month experiences weather conditions that are consistent with the rainy season. It introduces the calendar year with a relatively wet climate, with ample rainfall recorded at 2.83" (72mm). Weather in January »
Weather in February
Transitioning from January, February weather conditions hint towards a slightly reduced precipitation level. As the weeks advance, a pronounced change emerges in the form of a gradual decrease in both temperature and humidity, while windy conditions persist. Weather in February »
Weather in March
March brings about a subtle shift from the relatively cooler months of January and February. It is characterized by a humid climate, albeit offering a practical balance between rainfall and sunshine. The sea temperature gently rises to 82.6°F (28.1°C), enriching the possibilities for waterside recreation. Weather in March »
Weather in April
Entering April, a discernible change in temperature unfolds with the advent of summer. With high levels of warmth and humidity, the overall weather conditions suggest a classic tropical climate. The rise in temperature, peaking at 84.2°F (29°C) provides ample opportunities for visitors and locals alike to engage in various beach activities. Weather in April »
Weather in May
May constitutes the transition towards the much-anticipated dry season in Merizo. As the month advances, it lends to progressively hotter and drier days, coupled with the persistence of high humidity levels. The unique aspects of May include an increase in rainfall to 3.31" (84mm), an indicator of the continuing transformation to drier conditions. Weather in May »
Weather in June
June provides an inviting prelude to the tropical summer of Merizo, Guam. Marking the middle of the year, this month offers showers dispersed across a large number of days, indicative of the rainy season. June witnesses a marginal rise in temperature, with an average high of 84.6°F (29.2°C), indicating the peak of summer. Weather in June »
Weather in July
July records the year's highest rainfall level, attaining a significant 7.52" (191mm), indicating a shift to a wetter season. Despite the surge in rainfall, the summer temperature is maintained, reinforcing the tropical climate conditions. Weather in July »
Weather in August
As one steps into August, it becomes clear that it is one of the highest rainfall months of the year. The month mirrors July's robust climate pattern with a consistently high temperature and relative humidity level. August witnesses a slight decline in sea temperature, from 85.4°F (29.7°C) to 85°F (29.4°C), consistent with the fluctuating tropical weather. Weather in August »
Weather in September
September paints a picture of intense precipitation with the highest rainfall of the year at 10.28" (261mm). This month signifies the peak of the wet season in Merizo, owing to the increased frequency of rainfall days. Despite the precipitation rate, this transition month sustains a constant temperature and humidity, a classic tropical feature. Weather in September »
Weather in October
October marks a decline in rainfall volume from the high figures witnessed the previous month. The reduced precipitation, coupled with a gradual drop in temperature, gives an indication of the forthcoming dry season. The transitional weather gets nurtured further by cyclical changes in daylight hours and sunshine duration. Weather in October »
Weather in November
November in Merizo signifies the commencement of the dry season, characterized by a noticeable decrease in rainfall. It experiences a reduction in sea temperature and daylight hours, underlining the seasonal shift. A further drop in the intensity of precipitation to 4.69" (119mm) is a tell-tale sign of the drier months ahead. Weather in November »
Weather in December
December conclusively concludes the volatile weather transition from the wet to the dry season. The lower rainfall value of 2.99" (76mm) underlines the approach towards the dry spell. Consequently, a considerable increase in wind speed to 15.7 MPH, coupled with a dip in sea temperature, further marks the shift from the rainy season. Weather in December »
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the most humid months?
The months with the highest humidity in Merizo are January, March through May, October through December, with an average relative humidity of 78%.
How much does it rain?
In Merizo, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.
When is the highest UV index?
The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7.
What time of the year is the coldest?
Merizo's coldest month, February, generally records average temperatures ranging from a high of 81.7°F (27.6°C) to a low of 79.7°F (26.5°C).
What month is the ocean coldest?
February is the month with the coldest seawater in Merizo, with an average ocean temperature of 82°F (27.8°C).
What is the driest month?
March is the month with the least rainfall. Rain falls for 20.2 days and accumulates 1.81" (46mm) of precipitation.
When are the longest days?
June has the longest days of the year, with an average of 12h and 54min of daylight.
What month has the most sunshine?
The month with the most sunshine in Merizo is June, with an average of 10.6h of sunshine.
What is the hottest time of year?
Merizo's warmest months, July and August, record an average high-temperature of 84.7°F (29.3°C).
What is the least humid month?
August is the least humid month, with an average relative humidity of 76%.
When is the ocean warmest?
The month with the warmest seawater is August, with an average ocean temperature of 85.5°F (29.7°C).
What is the rainiest month in Merizo?
The month with the most rainfall is September, when the rain falls for 28.1 days and typically aggregates up to 10.28" (261mm) of precipitation.
When is the lowest UV index?
September is the month with the lowest UV index, with an average maximum UV index of 6.
What is the month with the least sunshine?
The month with the least sunshine is November, with an average of 6.3h of sunshine.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 11h and 24min of daylight.
Is there Daylight Saving Time (DST)?
Merizo does not utilize Daylight Saving Time (DST). ChST timezone is used over the entire year.
Average temperature
Merizo, GU
The warmest months (with the highest average high temperature) are July and August (84.7°F).
The month with the lowest average high temperature is February (81.7°F).
The month with the highest average low temperature is June (83.3°F).
The coldest month (with the lowest average low temperature) is February (79.7°F).
Average pressure
Merizo, GU
- Average pressure in January:
29.86"Hg - Average pressure in February:
29.88"Hg - Average pressure in March:
29.87"Hg - Average pressure in April:
29.86"Hg - Average pressure in May:
29.85"Hg - Average pressure in June:
29.84"Hg
- Average pressure in July:
29.8"Hg - Average pressure in August:
29.79"Hg - Average pressure in September:
29.79"Hg - Average pressure in October:
29.79"Hg - Average pressure in November:
29.82"Hg - Average pressure in December:
29.83"Hg
The month with the highest atmospheric pressure is February (29.88"Hg).
The months with the lowest atmospheric pressure are August, September and October (29.79"Hg).
Average wind speed
Merizo, GU
- Average wind speed in January:
15.8mph - Average wind speed in February:
16.3mph - Average wind speed in March:
15mph - Average wind speed in April:
13.7mph - Average wind speed in May:
11.7mph - Average wind speed in June:
11.6mph
- Average wind speed in July:
10.3mph - Average wind speed in August:
9.6mph - Average wind speed in September:
9.9mph - Average wind speed in October:
11.2mph - Average wind speed in November:
14.7mph - Average wind speed in December:
15.7mph
The windiest month (with the highest average wind speed) is February (16.3mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).
Average humidity
Merizo, GU
The months with the highest relative humidity are January, March, April, May, October, November and December (78%).
The month with the lowest relative humidity is August (76%).
Average rainfall
Merizo, GU
- Average rainfall in January:
2.83" - Average rainfall in February:
2.28" - Average rainfall in March:
1.81" - Average rainfall in April:
2.44" - Average rainfall in May:
3.31" - Average rainfall in June:
3.7"
- Average rainfall in July:
7.52" - Average rainfall in August:
9.76" - Average rainfall in September:
10.28" - Average rainfall in October:
8.46" - Average rainfall in November:
4.69" - Average rainfall in December:
2.99"
The wettest month (with the highest rainfall) is September (10.28").
The driest month (with the least rainfall) is March (1.81").
Average rainfall days
Merizo, GU
- Average rainfall days in January:
21.3 days - Average rainfall days in February:
17.5 days - Average rainfall days in March:
20.2 days - Average rainfall days in April:
19.3 days - Average rainfall days in May:
23.1 days - Average rainfall days in June:
25.4 days
- Average rainfall days in July:
28.9 days - Average rainfall days in August:
28.9 days - Average rainfall days in September:
28.1 days - Average rainfall days in October:
28.7 days - Average rainfall days in November:
24.3 days - Average rainfall days in December:
22.8 days
The months with the highest number of rainy days are July and August (28.9 days).
The month with the least rainy days is February (17.5 days).
Average sea temperature
Merizo, GU
The best month for swimming (with the highest average sea temperature) is August (85.4°F).
The coldest month (with the lowest average sea temperature) is February (82°F).
Average daylight / Average sunshine
Merizo, GU
- Average daylight in January:
11h and 2min - Average daylight in February:
11h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
12h and 2min - Average daylight in May:
12h and 4min - Average daylight in June:
12h and 5min
- Average daylight in July:
12h and 5min - Average daylight in August:
12h and 4min - Average daylight in September:
12h and 1min - Average daylight in October:
11h and 5min - Average daylight in November:
11h and 3min - Average daylight in December:
11h and 2min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in January:
7h and 4min - Average sunshine in February:
8h and 0min - Average sunshine in March:
8h and 1min - Average sunshine in April:
8h and 3min - Average sunshine in May:
10h and 3min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
8h and 4min - Average sunshine in August:
7h and 4min - Average sunshine in September:
7h and 5min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
6h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 18min).
Average sunshine days
Merizo, GU
- Average sunshine days in January:
5.4 days - Average sunshine days in February:
5.8 days - Average sunshine days in March:
6.6 days - Average sunshine days in April:
5.8 days - Average sunshine days in May:
4.3 days - Average sunshine days in June:
2.1 days
- Average sunshine days in July:
1.4 days - Average sunshine days in August:
1.6 days - Average sunshine days in September:
1.1 days - Average sunshine days in October:
1.4 days - Average sunshine days in November:
3.6 days - Average sunshine days in December:
4.7 days
The month with the most sunshine days is March (6.6 days).
The month with the least sunshine days is September (1.1 days).
Average UV index
Merizo, GU
The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
The month with the lowest UV index is September (UV index 6).
Average cloud cover
Merizo, GU
The months with the most cloud cover are January, August and October (Cloud cover 46).
The months with the least cloud cover are May and June (Cloud cover 39).
Average visibility
Merizo, GU
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Merizo, Guam, USA
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