Climate and monthly weather forecastPiti, GU
Climate and monthly weather forecast
The climate of Piti
Falling under the broad umbrella of the Af or Tropical Rainforest Köppen climate classification, Piti, Guam, USA is characetrized by a constant, tropical climate. The town's geographic location plays a role in maintaining its relatively steady environmental conditions. Throughout the year, Piti displays minimal variation in temperature, pressures, and humidity.On a monthly basis, temperature highs hover around 84.7°F (29.3°C) while lows never dip below 79.7°F (26.5°C). Piti's relative humidity is consistent as well. Most months record humidity percentages between around 78%, giving it a boiling, tropical feel. Additionally, atmospheric pressure remains fairly consistent throughout the year, fluctuating from 29.79 in to 29.88 in.
Rainfall draws a distinct pattern of variation, however. The wettest months are from August to October with an average rainfall between 8.46 in to 10.28 in. The driest months tend to be February and March when rainfall gets as low as 1.81 to 2.28 in. In line with these patterns, the number of rainy days per month also increases from June until November from 23.1 to 28.9.
Another interesting trait observed in Piti is the wind pattern. While average wind speed stays consistent from 9.6mph (15.4km/h) to 16.3mph (26.2km/h) throughout the year, wind gusts tend to be at their most severe at the start and end of the year, reaching up to 22.2mph (35.7km/h) in January and December.
The best time to visit Piti
Considering Piti's climate data, visitors might find the months of March and April to be the most appealing to visit. During this time, Piti experiences relatively lower rainfall amounting to 1.81 in to 2.44 in. At the same time, the town basks in up to 8.1 to 8.5 hours of sunshine daily. Sea temperature also leans toward the warmer side, averaging 82.6 to 82.9°F (28.3°C), which could make beach visits and water activities more enjoyable.The worst time to visit Piti
Contrasting the previously mentioned period, the months from August to October might be less ideal for visiting Piti. During these months, the town experiences its highest rainfall rates, seeing an average of 8.46 in to 10.28 in per month. These months also register the highest numbers of rainy days. Furthermore, the robust showers are coupled with the lowest hours of sunshine, as low as 6.9 to 7.9 hours, which can limit outdoor activities.Spring weather in Piti
Spring time in Piti, falling between March and May, offers quite favorable weather conditions. During this period, the rainfall is lowest (from 1.81 in to 3.31 in). The average number of sunshine hours reaches its peak at an average 8.1 to 10.5 hours daily. The high temperature fluctuates around 82°F (27.8°C) to 84.2°F (29°C), and the low from 80.1°F (26.7°C) to 82.2°F (27.9°C), while consistently balmy sea temperatures remain from 82.6°F (28.1°C) to 84°F (28.9°C).Summer weather in Piti
Temperatures during the summer months of June to August in Piti continue to be around 84.6°F (29.2°C), reaching up to 84.7°F (29.3°C). But there's a significant shift in other environmental parameters. It's the season when rainfall is at its highest, ranging from 3.7 in to 9.76 in. Despite the high rainfall, the sea temperatures retain their warmth, lingering from 84.8°F (29.3°C) to 85.4°F (29.7°C).Autumn weather in Piti
Autumn weather in Piti sees some changes in September through November. Rainfall remains high in September at 10.28 in but starts decreasing from thereon, reaching 4.69 in by November. The number of sunshine hours decrease as well, with November seeing only 6.3 hours. It's during this period that the sea temperature starts its descent, moving from 85°F (29.4°C) down to 84.5°F (29.2°C).Winter weather in Piti
In Piti, December to February is categorized as winter. This season experiences a further decrease in rainfall down to 2.99 in by February, and a slight decline in temperature, with lows at 79.7°F (26.5°C). Hours of sunshine moderately increase, especially in February where it reaches 6.5 hours. Sea temperature continues its downtrend, reaching 82.9°F (28.3°C) by January, and decreasing further in February to 82°F (27.8°C).Weather in January
Weather in Piti, Guam, begins the new year with moderate high temperatures. Minor variations in weather are noticeable from December, mainly a slight rise in temperature and less rainfall. Relatively, January is a tad cooler than February, which brings about a subtle shift in climates. Weather in January »Weather in February
February weather in Piti, Guam, is characterized by steady temperatures, quite similar to those of January. Only slight variations in the temperature occur, with the mild climate inviting for outdoor activities. February, however, is relatively dryer than March with regard to rainfall, which converts Piti into a haven for beach enthusiasts. Weather in February »Weather in March
March marks a transition period in Piti, with the weather slowly starting to heat up compared to February. The pleasant temperature and moderate rainfall make March an excellent time for tourists to delve into various outdoor activities. Weather in March »Weather in April
Piti's April weather is noted for its slightly warmer climate when compared to March. These changes, although minor, could lead to more frequent short rain showers, enhancing the lush greenery of Piti. Heading into May, the climate is observed to become a bit more humid and warmer. Weather in April »Weather in May
May, often associated with the onset of summer, leads to an increase in temperature in Piti, Guam when compared to April. This month is characterized by higher humidity and more generous sunlight hours, perfect for sunbathing and enjoying the island's sandy beaches. Weather in May »Weather in June
Weather in Piti during June displays a significant increase in temperature compared to May. The air becomes more humid, but manageable with the help of the cool sea breeze reaching 11.6mph (18.7km/h) in intensity. The advent of July pushes the mercury even higher, preparing Piti for its warmest period of the year. Weather in June »Weather in July
July is famous for its warm summer streak in Piti, Guam. Compared to June, conditions continue to be hot, yet manageable owing to the irresistible beaches and recreational water sports popular in the city. Although the weather becomes hotter moving into August, it is the generous rainfall of 7.52" (191mm) in July that steals the show, making it the wettest month of the year. Piti's warmest season falls during July and August, averaging a high-temperature of 84.7°F (29.3°C). The average heat index in July is appraised at a very hot 95°F (35°C). Weather in July »Weather in August
Despite the stable climate, Piti's weather witnesses a noticeable increase in rainfall from July to August. The rainfall, however, comes with a silver lining, as it unveils an exceptionally lush, green landscape of city making it appear refreshed. Weather in August »Weather in September
September in Piti is characterized by steady, warm temperatures with a moderate decrease in rainfall compared to August. The climate remains warm, enticing inhabitants and tourists to indulge in outdoor activities and explore the city landscapes. Weather in September »Weather in October
In October, Piti residents and visitors experience a slight cool down in comparison to September with temperatures falling gently. Though temperatures remain pleasant, there is a significant decrease in rainfall from September to October. Weather in October »Weather in November
November in Piti is recognized for its cool temperatures, a slight but noticeable drop from October. The weather is still warm enough to enjoy beach outings and other outdoor activities. The arrival of December does not bring a considerable shift in climatic conditions, but late-night chill and early morning mist become more frequent. Weather in November »Weather in December
December in Piti, Guam, marks the culmination of the year with temperatures comfortably cooler compared to November. Despite a decrease in temperature, the weather remains pleasant enough for outdoor activities and beach visits. Weather in December »Updated: Aug 24, 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
The months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%.
Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.
The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7.
With average high and low temperatures of 81.7°F (27.6°C) and 79.7°F (26.5°C) respectively, February is Piti's coldest month.
With an average ocean temperature of 82°F (27.8°C), February is the month with the coldest seawater.
The month with the least rainfall is March, when the rain falls for 20.2 days and typically collects 1.81" (46mm) of precipitation.
June has the longest days of the year, with an average of 12h and 54min of daylight.
June has the most sunshine of the year, with an average of 10.6h of sunshine.
Piti's temperature peaks during July and August, with an average high-temperature of 84.7°F (29.3°C).
With an average relative humidity of 76%, August is the least humid month.
With an average ocean temperature of 85.5°F (29.7°C), August is the month with the warmest seawater.
September is the month with the most rainfall. Rain falls for 28.1 days and accumulates 10.28" (261mm) of precipitation.
With an average maximum UV index of 6, September is the month with the lowest UV index in Piti.
With an average of 6.3h of sunshine, November has the least sunshine of the year.
December has the shortest days of the year, with an average of 11h and 24min of daylight.
Piti does not utilize Daylight Saving Time (DST). ChST timezone is used over the entire year.
Average temperature
Piti, 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
Piti, 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
Piti, 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
Piti, 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
Piti, 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
Piti, 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
Piti, 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
Piti, GU
- Average daylight in January:
11h and 24min - Average daylight in February:
11h and 42min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 24min - Average daylight in May:
12h and 42min - Average daylight in June:
12h and 54min
- Average daylight in July:
12h and 48min - Average daylight in August:
12h and 36min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 48min - Average daylight in November:
11h and 30min - Average daylight in December:
11h and 24min
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 36min - Average sunshine in February:
8h and 0min - Average sunshine in March:
8h and 6min - Average sunshine in April:
8h and 30min - Average sunshine in May:
10h and 30min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
8h and 36min - Average sunshine in August:
7h and 36min - Average sunshine in September:
7h and 54min - Average sunshine in October:
6h and 54min - Average sunshine in November:
6h and 18min - Average sunshine in December:
6h and 30min
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
Piti, 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
Piti, 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
Piti, 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
Piti, 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).
