May is one of the warmer months of the year in East Siang, with average highs near 32.8°C and lows around 22.1°C (mean 27.5°C). It is a relatively wet time of year, averaging 275 mm of rainfall and 66% relative humidity across the period.
May is one of the warmer months of the year in East Siang. Across 45 years of records, the warmest May in East Siang was 1998 — when the month averaged 29.8°C — while the coldest was 1983 at 26°C. Typical May days reach 32.8°C with nights near 22.1°C. The long-term May temperature trend is broadly flat.
May is a relatively wet time of year in East Siang, averaging 275 mm of rainfall. The wettest May on record was 2004 with 627 mm, while the driest was 1986 at 80 mm.
Relative humidity in East Siang during May averages 66%. The most humid May was 2010 at 75%, and the least humid was 2003 at 56%.
May receives about 4 kWh/m²/day of solar energy in East Siang. The sunniest May was 1995 at 5.1 kWh/m²/day, and the cloudiest was 2019 at 2.6.
Average wind speed in East Siang during May is 0.5 m/s. The windiest Mays were 1997, 2003 and 2023, among others at 0.6 m/s, while the calmest were 2022, 2024 and 2025, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.2°C | 27.7°C | 27.9°C | 27.2°C | 27.0°C | -0.2°C |
| Avg High | 32.8°C | 33.4°C | 33.4°C | 32.1°C | 31.8°C | -1°C |
| Avg Low | 21.6°C | 22.0°C | 22.4°C | 22.3°C | 22.2°C | +0.6°C |
| Avg Rain | 205 mm | 243 mm | 255 mm | 341 mm | 355 mm | +150 mm |
May temperatures in East Siang have stayed relatively stable across the record.
May has ranged from a record low of 16.3°C (1983) to a record high of 45.5°C (1993).
Rainfall in May is a relatively wet time of year, averaging 275 mm, with a wettest year of 627 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.3°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A good time to visit East Siang
May is a good time to visit East Siang, with days averaging 32.8°C and nights around 22.1°C (mean 27.5°C, warmer than East Siang's yearly average) and higher rainfall. November and March are marginally more temperate, but May still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 31.5°C | 27.2°C | 22.8°C | 35.5°C | 19.4°C | 310 mm | 72% | 0.5 m/s | 3.5 |
| 2024 | 33.0°C | 27.8°C | 22.6°C | 39.6°C | 19.8°C | 202 mm | 68% | 0.5 m/s | 3.9 |
| 2023 | 31.4°C | 26.3°C | 21.2°C | 36.5°C | 17.8°C | 225 mm | 66% | 0.6 m/s | 3.6 |
| 2022 | 31.3°C | 27.0°C | 22.6°C | 35.0°C | 19.1°C | 520 mm | 72% | 0.5 m/s | 3.8 |
| 2021 | 31.9°C | 27.1°C | 22.3°C | 36.8°C | 19.4°C | 362 mm | 71% | 0.5 m/s | 3 |
| 2020 | 31.5°C | 26.7°C | 21.9°C | 35.4°C | 20.3°C | 507 mm | 71% | 0.5 m/s | 4.1 |
| 2019 | 32.2°C | 27.3°C | 22.4°C | 39.0°C | 21.0°C | 388 mm | 70% | 0.5 m/s | 2.6 |
| 2018 | 31.4°C | 26.8°C | 22.1°C | 35.5°C | 19.3°C | 293 mm | 70% | 0.5 m/s | 3.5 |
| 2017 | 32.3°C | 27.5°C | 22.6°C | 35.2°C | 17.7°C | 364 mm | 71% | 0.5 m/s | 3.9 |
| 2016 | 31.6°C | 26.9°C | 22.3°C | 35.2°C | 18.2°C | 271 mm | 71% | 0.5 m/s | 4.1 |
| 2015 | 32.4°C | 27.3°C | 22.1°C | 35.3°C | 19.8°C | 399 mm | 70% | 0.5 m/s | 3.6 |
| 2014 | 32.2°C | 27.4°C | 22.7°C | 37.3°C | 19.2°C | 463 mm | 70% | 0.5 m/s | 3.2 |
| 2013 | 31.5°C | 26.9°C | 22.4°C | 35.5°C | 18.5°C | 399 mm | 75% | 0.5 m/s | 3.9 |
| 2012 | 33.4°C | 27.9°C | 22.5°C | 38.0°C | 18.0°C | 273 mm | 63% | 0.5 m/s | 4.8 |
| 2011 | 32.7°C | 27.3°C | 21.9°C | 36.1°C | 18.5°C | 154 mm | 67% | 0.5 m/s | 4.5 |
| 2010 | 30.8°C | 26.4°C | 22.1°C | 34.0°C | 18.5°C | 406 mm | 75% | 0.5 m/s | 3.5 |
| 2009 | 32.9°C | 27.6°C | 22.3°C | 38.4°C | 20.6°C | 201 mm | 66% | 0.5 m/s | 4.3 |
| 2008 | 32.9°C | 27.7°C | 22.6°C | 37.6°C | 19.8°C | 347 mm | 63% | 0.5 m/s | 4 |
| 2007 | 33.5°C | 28.2°C | 22.9°C | 39.1°C | 19.5°C | 159 mm | 64% | 0.5 m/s | 4.4 |
| 2006 | 33.6°C | 28.0°C | 22.4°C | 44.0°C | 19.5°C | 276 mm | 64% | 0.5 m/s | 4.1 |
| 2005 | 31.9°C | 26.6°C | 21.3°C | 38.8°C | 19.1°C | 305 mm | 64% | 0.5 m/s | 3.7 |
| 2004 🌧️ | 32.8°C | 27.5°C | 22.1°C | 41.8°C | 18.9°C | 627 mm | 66% | 0.5 m/s | 3.5 |
| 2003 | 34.5°C | 28.5°C | 22.4°C | 39.1°C | 19.4°C | 137 mm | 56% | 0.6 m/s | 3.6 |
| 2002 | 32.9°C | 27.3°C | 21.7°C | 37.7°C | 17.8°C | 168 mm | 65% | 0.5 m/s | 4.7 |
| 2001 | 34.4°C | 28.6°C | 22.9°C | 38.4°C | 20.5°C | 168 mm | 61% | 0.5 m/s | 4.2 |
| 2000 | 34.4°C | 28.7°C | 23.0°C | 39.4°C | 18.8°C | 165 mm | 63% | 0.5 m/s | 4 |
| 1999 | 33.6°C | 28.3°C | 22.9°C | 38.8°C | 20.2°C | 104 mm | 66% | 0.5 m/s | 4 |
| 1998 🔥 | 36.1°C | 29.8°C | 23.5°C | 43.3°C | 20.6°C | 177 mm | 58% | 0.5 m/s | 5 |
| 1997 | 33.5°C | 27.5°C | 21.4°C | 36.9°C | 19.9°C | 223 mm | 59% | 0.6 m/s | 4.6 |
| 1996 | 32.7°C | 27.2°C | 21.6°C | 36.8°C | 18.2°C | 432 mm | 66% | 0.5 m/s | 4.3 |
| 1995 | 33.7°C | 28.0°C | 22.2°C | 37.2°C | 19.4°C | 437 mm | 65% | 0.5 m/s | 5.1 |
| 1994 | 34.5°C | 28.4°C | 22.3°C | 40.9°C | 20.0°C | 242 mm | 60% | 0.6 m/s | 4.4 |
| 1993 | 32.3°C | 26.9°C | 21.6°C | 45.5°C | 19.1°C | 238 mm | 65% | 0.5 m/s | 4.2 |
| 1992 | 32.0°C | 26.5°C | 21.1°C | 40.7°C | 19.1°C | 192 mm | 63% | 0.6 m/s | 3.9 |
| 1991 | 33.2°C | 27.6°C | 22.0°C | 39.1°C | 18.6°C | 81 mm | 62% | 0.5 m/s | 3.8 |
| 1990 | 32.6°C | 27.2°C | 21.8°C | 35.7°C | 17.9°C | 305 mm | 66% | 0.5 m/s | 4.2 |
| 1989 | 33.3°C | 27.8°C | 22.2°C | 37.6°C | 17.2°C | 180 mm | 64% | 0.5 m/s | 4.6 |
| 1988 | 32.4°C | 27.3°C | 22.1°C | 35.2°C | 19.5°C | 388 mm | 68% | 0.5 m/s | 3.9 |
| 1987 | 33.8°C | 27.5°C | 21.3°C | 42.5°C | 18.0°C | 131 mm | 59% | 0.5 m/s | 4.1 |
| 1986 | 34.2°C | 27.5°C | 20.9°C | 38.7°C | 18.1°C | 80 mm | 58% | 0.5 m/s | 5 |
| 1985 | 33.6°C | 27.5°C | 21.5°C | 37.2°C | 18.3°C | 180 mm | 61% | 0.5 m/s | 3.4 |
| 1984 | 32.7°C | 27.2°C | 21.7°C | 36.3°C | 19.9°C | 180 mm | 63% | 0.5 m/s | 4.6 |
| 1983 ❄️ | 31.2°C | 26.0°C | 20.8°C | 37.9°C | 16.3°C | 256 mm | 66% | 0.5 m/s | — |
| 1982 | 32.3°C | 26.9°C | 21.4°C | 35.4°C | 17.4°C | 131 mm | 65% | 0.5 m/s | — |
| 1981 | 32.1°C | 27.1°C | 22.2°C | 35.4°C | 19.6°C | 316 mm | 68% | 0.5 m/s | — |
Actual recorded May data for each year, 1981–2025 — sourced from NASA POWER.
The average high in May is around 32.8°C with lows near 22.1°C (mean 27.5°C), based on 45 years of NASA POWER data.
May averages 275 mm of rainfall in East Siang, a relatively wet time of year. The wettest on record was 627 mm in 2004.
The hottest May reached 45.5°C in 1993. The coldest dipped to 16.3°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average May temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 21.5°C to 22.3°C while daytime highs eased from 32.4°C to 31.8°C, narrowing the gap between day and night.
May is one of the warmer months of the year in East Siang and a relatively wet time of year, so plan for around 32.8°C daytime highs and 22.1°C at night.
Not quite — May is the 8th coolest month in East Siang, averaging 27.5°C.
For May in East Siang, pack light, breathable clothing and sun protection, with typical highs of 32.8°C and lows of 22.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in May averages 66% — moderately humid.
Average wind speed in May is 0.5 m/s. The windiest May on record averaged 0.6 m/s (1992).
The wettest May on record was 2004 with 627 mm. On average, May sees 275 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in East Siang behaves each May, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for May specifically, along with year-by-year records and how the month has changed over the decades.
