Average Weather in Serui Indonesia
The climate in Serui is hot, oppressive, and overcast. Over the course of the year, the temperature typically varies from 74°F to 87°F and is rarely below 73°F or above 90°F.
Based on the beach/pool score, the best time of year to visit Serui for hot-weather activities is from mid April to late November.
The temperature in Serui varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Serui, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Serui begins around April 28 and lasts for 5.1 months, ending around September 30. On August 17, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 26% of the time, and overcast or mostly cloudy 74% of the time.
The cloudier part of the year begins around September 30 and lasts for 6.9 months, ending around April 28. On December 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 88% of the time, and clear, mostly clear, or partly cloudy 12% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Serui varies throughout the year.
The wetter season lasts 7.9 months, from November 28 to July 26, with a greater than 52% chance of a given day being a wet day. The chance of a wet day peaks at 60% on February 5.
The drier season lasts 4.1 months, from July 26 to November 28. The smallest chance of a wet day is 44% on October 27.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 60% on February 5.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Serui experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Serui. The most rain falls during the 31 days centered around March 19, with an average total accumulation of 9.3 inches.
The least rain falls around November 2, with an average total accumulation of 6.4 inches.
Average Monthly Rainfall
The length of the day in Serui does not vary substantially over the course of the year, staying within 14 minutes of 12 hours throughout. In 2020, the shortest day is June 21, with 12 hours, 1 minute of daylight; the longest day is December 21, with 12 hours, 14 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:33 AM on November 7, and the latest sunrise is 31 minutes later at 6:04 AM on February 16. The earliest sunset is at 5:43 PM on October 30, and the latest sunset is 31 minutes later at 6:14 PM on February 7.
Daylight saving time (DST) is not observed in Serui during 2020.
Sunrise & Sunset with Twilight
The perceived humidity level in Serui, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 100% throughout.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Serui experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 6.0 months, from November 4 to May 5, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is March 5, with an average hourly wind speed of 6.9 miles per hour.
The calmer time of year lasts for 6.0 months, from May 5 to November 4. The calmest day of the year is July 20, with an average hourly wind speed of 5.1 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Serui varies throughout the year.
The wind is most often from the north for 6.0 days, from May 8 to May 14; for 2.1 weeks, from June 3 to June 18; and for 1.0 months, from September 1 to October 2, with a peak percentage of 35% on June 3. The wind is most often from the east for 2.9 weeks, from May 14 to June 3; for 2.6 weeks, from July 4 to July 22; and for 1.9 weeks, from August 19 to September 1, with a peak percentage of 35% on May 25. The wind is most often from the west for 2.3 weeks, from June 18 to July 4; for 4.0 weeks, from July 22 to August 19; and for 7.2 months, from October 2 to May 8, with a peak percentage of 35% on August 7.
Serui is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature does not vary significantly over the course of the year, remaining within 1°F of 85°F throughout.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Serui throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Serui for general outdoor tourist activities is from early May to mid November, with a peak score in the second week of August.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Serui for hot-weather activities is from mid April to late November, with a peak score in the second week of August.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
Temperatures in Serui are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season
Growing Degree Days
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Serui are -1.880 deg latitude, 136.243 deg longitude, and 108 ft elevation.
The topography within 2 miles of Serui contains very significant variations in elevation, with a maximum elevation change of 1,667 feet and an average elevation above sea level of 266 feet. Within 10 miles contains very significant variations in elevation (4,557 feet). Within 50 miles also contains extreme variations in elevation (4,813 feet).
The area within 2 miles of Serui is covered by trees (49%), water (20%), and cropland (18%), within 10 miles by water (56%) and trees (27%), and within 50 miles by water (82%) and trees (14%).
This report illustrates the typical weather in Serui, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There is only a single weather station, Serui / Yendosa, in our network suitable to be used as a proxy for the historical temperature and dew point records of Serui.
At a distance of 2 kilometer from Serui, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Serui according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
Time zones for aiports and weather stations are provided by AskGeo.com .