Climate and Average Weather Year Round in Ithari Nepal

In Ithari, the wet season is oppressive and mostly cloudy, the dry season is clear, and it is hot year round. Over the course of the year, the temperature typically varies from 54°F to 100°F and is rarely below 50°F or above 106°F.

Based on the beach/pool score, the best times of year to visit Ithari for hot-weather activities are from mid March to mid May and for the entire month of October.

The hot season lasts for 3.0 months, from March 24 to June 24, with an average daily high temperature above 96°F. The hottest month of the year in Ithari is June, with an average high of 97°F and low of 81°F.

The cool season lasts for 2.3 months, from November 28 to February 8, with an average daily high temperature below 81°F. The coldest month of the year in Ithari is January, with an average low of 54°F and high of 77°F.

In Ithari, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Ithari begins around September 25 and lasts for 8.7 months, ending around June 16.

The clearest month of the year in Ithari is November, during which on average the sky is clear, mostly clear, or partly cloudy 91% of the time.

The cloudier part of the year begins around June 16 and lasts for 3.3 months, ending around September 25.

The cloudiest month of the year in Ithari is August, during which on average the sky is overcast or mostly cloudy 81% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Ithari varies very significantly throughout the year.

The wetter season lasts 4.5 months, from May 13 to September 27, with a greater than 36% chance of a given day being a wet day. The month with the most wet days in Ithari is July, with an average of 21.4 days with at least 0.04 inches of precipitation.

The drier season lasts 7.5 months, from September 27 to May 13. The month with the fewest wet days in Ithari is December, with an average of 0.6 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Ithari is July, with an average of 21.4 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 71% on July 5.

Rainfall

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. Ithari experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.4 months, from March 22 to November 3, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Ithari is July, with an average rainfall of 9.6 inches.

The rainless period of the year lasts for 4.6 months, from November 3 to March 22. The month with the least rain in Ithari is December, with an average rainfall of 0.1 inches.

The length of the day in Ithari varies over the course of the year. In 2024, the shortest day is December 21, with 10 hours, 28 minutes of daylight; the longest day is June 21, with 13 hours, 49 minutes of daylight.

The earliest sunrise is at 5:01 AM on June 9, and the latest sunrise is 1 hour, 44 minutes later at 6:45 AM on January 13. The earliest sunset is at 5:02 PM on November 29, and the latest sunset is 1 hour, 51 minutes later at 6:53 PM on July 2.

Daylight saving time (DST) is not observed in Ithari during 2024.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Ithari experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.5 months, from May 8 to October 26, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The month with the most muggy days in Ithari is August, with 31.0 days that are muggy or worse.

The least muggy day of the year is February 5, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Ithari experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from February 4 to September 12, with average wind speeds of more than 5.3 miles per hour. The windiest month of the year in Ithari is April, with an average hourly wind speed of 6.6 miles per hour.

The calmer time of year lasts for 4.8 months, from September 12 to February 4. The calmest month of the year in Ithari is November, with an average hourly wind speed of 3.9 miles per hour.

The predominant average hourly wind direction in Ithari varies throughout the year.

The wind is most often from the west for 3.2 months, from January 7 to April 14, with a peak percentage of 48% on March 3. The wind is most often from the east for 5.9 months, from April 14 to October 11, with a peak percentage of 61% on July 23. The wind is most often from the north for 2.3 months, from October 28 to January 7, with a peak percentage of 34% on January 1.

To characterize how pleasant the weather is in Ithari 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 times of year to visit Ithari for general outdoor tourist activities are from mid February to mid March and from mid October to mid December, with a peak score in the second week of November.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Ithari for hot-weather activities are from mid March to mid May and for the entire month of October, with a peak score in the second week of April.

Methodology

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.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Ithari 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.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.7 months, from March 21 to June 11, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest month of the year in Ithari is May, with an average of 7.1 kWh.

The darker period of the year lasts for 2.5 months, from November 11 to January 27, with an average daily incident shortwave energy per square meter below 4.6 kWh. The darkest month of the year in Ithari is December, with an average of 4.1 kWh.

For the purposes of this report, the geographical coordinates of Ithari are 26.667 deg latitude, 87.283 deg longitude, and 384 ft elevation.

The topography within 2 miles of Ithari contains only modest variations in elevation, with a maximum elevation change of 112 feet and an average elevation above sea level of 384 feet. Within 10 miles contains only modest variations in elevation (2,533 feet). Within 50 miles contains large variations in elevation (11,355 feet).

The area within 2 miles of Ithari is covered by cropland (98%), within 10 miles by cropland (72%) and trees (23%), and within 50 miles by cropland (64%) and trees (22%).