April is close to West Siang's year-round average, with average highs near 27°C and lows around 15.6°C (mean 21.3°C). It is about average for rainfall, averaging 213 mm of rainfall and 71% relative humidity across the period.
April is close to West Siang's year-round average. Across 45 years of records, the warmest April in West Siang was 1999 — when the month averaged 24°C — while the coldest was 1990 at 19.3°C. Typical April days reach 27°C with nights near 15.6°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in West Siang, averaging 213 mm of rainfall. The wettest April on record was 2025 with 537 mm, while the driest was 1991 at 23 mm.
Relative humidity in West Siang during April averages 71%. The most humid April was 2022 at 83%, and the least humid was 1999 at 58%.
April receives about 3.5 kWh/m²/day of solar energy in West Siang. The sunniest Aprils were 1992, 1998 and 2019 at 4 kWh/m²/day, and the cloudiest was 2022 at 2.9.
Average wind speed in West Siang during April is 0.4 m/s. The windiest Aprils were 2022, 2023 and 2025, among others at 0.4 m/s, while the calmest were 1982, 2016 and 2024 at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.9°C | 21.2°C | 21.5°C | 21.6°C | 21.5°C | +0.6°C |
| Avg High | 26.7°C | 27.9°C | 27.3°C | 26.6°C | 26.6°C | -0.1°C |
| Avg Low | 15.0°C | 14.6°C | 15.7°C | 16.6°C | 16.3°C | +1.3°C |
| Avg Rain | 184 mm | 152 mm | 216 mm | 255 mm | 281 mm | +96 mm |
April temperatures in West Siang have risen by about 0.9°C between 1981–1985 and 2021–2025.
April has ranged from a record low of 9°C (1993) to a record high of 35.9°C (1999).
Rainfall in April is about average for rainfall, averaging 213 mm, with a wettest year of 537 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.1°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit West Siang
April is one of the best times to visit West Siang. Expect days averaging 27°C and nights around 15.6°C (mean 21.3°C) — close to West Siang's yearly average — with higher rainfall (213 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 🌧️ | 26.7°C | 21.8°C | 16.8°C | 31.1°C | 13.5°C | 537 mm | 76% | 0.4 m/s | 3.2 |
| 2024 | 27.5°C | 22.0°C | 16.5°C | 30.7°C | 13.9°C | 170 mm | 74% | 0.3 m/s | 3.1 |
| 2023 | 26.5°C | 21.3°C | 16.0°C | 31.6°C | 11.9°C | 137 mm | 75% | 0.4 m/s | 3 |
| 2022 | 25.5°C | 21.2°C | 16.9°C | 28.8°C | 14.6°C | 476 mm | 83% | 0.4 m/s | 2.9 |
| 2021 | 27.2°C | 21.7°C | 16.1°C | 32.9°C | 13.3°C | 104 mm | 72% | 0.4 m/s | 3.6 |
| 2020 | 26.0°C | 20.7°C | 15.4°C | 30.7°C | 12.3°C | 260 mm | 75% | 0.4 m/s | 3.4 |
| 2019 | 27.3°C | 22.0°C | 16.6°C | 32.8°C | 13.1°C | 137 mm | 72% | 0.4 m/s | 4 |
| 2018 | 27.0°C | 21.7°C | 16.3°C | 30.2°C | 12.7°C | 155 mm | 73% | 0.4 m/s | 3.8 |
| 2017 | 25.7°C | 21.4°C | 17.2°C | 30.6°C | 13.8°C | 383 mm | 80% | 0.4 m/s | 3.3 |
| 2016 | 25.9°C | 21.6°C | 17.3°C | 29.2°C | 14.8°C | 410 mm | 82% | 0.3 m/s | 3 |
| 2015 | 24.7°C | 20.5°C | 16.4°C | 29.2°C | 13.7°C | 259 mm | 80% | 0.4 m/s | 3 |
| 2014 | 29.2°C | 22.9°C | 16.6°C | 32.5°C | 12.9°C | 59 mm | 64% | 0.4 m/s | 3.6 |
| 2013 | 27.6°C | 22.2°C | 16.7°C | 35.7°C | 12.6°C | 189 mm | 73% | 0.4 m/s | 3.1 |
| 2012 | 25.5°C | 20.7°C | 15.9°C | 30.6°C | 11.6°C | 318 mm | 78% | 0.4 m/s | 3.1 |
| 2011 | 26.5°C | 21.2°C | 15.9°C | 29.9°C | 13.3°C | 154 mm | 74% | 0.4 m/s | 3.5 |
| 2010 | 26.3°C | 21.9°C | 17.4°C | 30.2°C | 15.3°C | 488 mm | 81% | 0.4 m/s | 3.5 |
| 2009 | 27.6°C | 22.0°C | 16.4°C | 31.4°C | 10.8°C | 180 mm | 73% | 0.4 m/s | 3.4 |
| 2008 | 27.6°C | 21.7°C | 15.8°C | 31.3°C | 12.6°C | 240 mm | 70% | 0.4 m/s | 3.2 |
| 2007 | 26.7°C | 21.3°C | 15.9°C | 31.6°C | 12.0°C | 273 mm | 74% | 0.4 m/s | 3.9 |
| 2006 | 27.3°C | 21.3°C | 15.4°C | 33.7°C | 12.1°C | 236 mm | 70% | 0.4 m/s | 3.7 |
| 2005 | 26.1°C | 20.9°C | 15.7°C | 29.6°C | 12.0°C | 225 mm | 75% | 0.4 m/s | 3.1 |
| 2004 | 26.6°C | 21.0°C | 15.5°C | 30.3°C | 13.0°C | 194 mm | 73% | 0.4 m/s | 3.7 |
| 2003 | 28.1°C | 22.0°C | 15.9°C | 31.9°C | 12.2°C | 165 mm | 69% | 0.4 m/s | 3.6 |
| 2002 | 27.3°C | 21.4°C | 15.5°C | 30.4°C | 11.8°C | 305 mm | 70% | 0.4 m/s | 3.4 |
| 2001 | 28.0°C | 21.8°C | 15.6°C | 32.6°C | 12.5°C | 109 mm | 65% | 0.4 m/s | 3 |
| 2000 | 27.3°C | 21.3°C | 15.3°C | 32.1°C | 12.0°C | 232 mm | 69% | 0.4 m/s | 3.8 |
| 1999 🔥 | 31.6°C | 24.0°C | 16.5°C | 35.9°C | 12.3°C | 245 mm | 58% | 0.4 m/s | 3.1 |
| 1998 | 28.4°C | 21.7°C | 15.1°C | 32.7°C | 10.7°C | 87 mm | 64% | 0.4 m/s | 4 |
| 1997 | 26.2°C | 19.9°C | 13.6°C | 31.5°C | 10.4°C | 117 mm | 66% | 0.4 m/s | 3.9 |
| 1996 | 28.4°C | 21.3°C | 14.2°C | 33.0°C | 9.4°C | 174 mm | 65% | 0.4 m/s | 3.7 |
| 1995 | 28.5°C | 21.2°C | 13.9°C | 32.2°C | 10.5°C | 135 mm | 62% | 0.4 m/s | 3.8 |
| 1994 | 27.3°C | 20.8°C | 14.4°C | 30.8°C | 11.7°C | 209 mm | 68% | 0.4 m/s | 3.9 |
| 1993 | 27.5°C | 20.8°C | 14.0°C | 31.1°C | 9.0°C | 111 mm | 65% | 0.4 m/s | 3.8 |
| 1992 | 28.0°C | 21.3°C | 14.5°C | 30.5°C | 11.3°C | 171 mm | 66% | 0.4 m/s | 4 |
| 1991 | 28.7°C | 22.0°C | 15.2°C | 33.4°C | 12.3°C | 23 mm | 59% | 0.4 m/s | 3.3 |
| 1990 ❄️ | 24.4°C | 19.3°C | 14.2°C | 28.5°C | 10.0°C | 250 mm | 78% | 0.4 m/s | 3.3 |
| 1989 | 27.0°C | 20.7°C | 14.5°C | 30.2°C | 10.2°C | 207 mm | 68% | 0.4 m/s | 3.7 |
| 1988 | 27.9°C | 21.5°C | 15.1°C | 31.7°C | 10.7°C | 186 mm | 68% | 0.4 m/s | 3.7 |
| 1987 | 27.3°C | 21.5°C | 15.6°C | 30.9°C | 13.9°C | 218 mm | 70% | 0.4 m/s | 3.7 |
| 1986 | 26.5°C | 20.8°C | 15.1°C | 30.9°C | 11.8°C | 172 mm | 71% | 0.4 m/s | 3.7 |
| 1985 | 27.3°C | 21.4°C | 15.5°C | 32.0°C | 10.5°C | 137 mm | 71% | 0.4 m/s | 3.4 |
| 1984 | 27.9°C | 21.9°C | 15.9°C | 30.8°C | 13.1°C | 189 mm | 69% | 0.4 m/s | 3.7 |
| 1983 | 26.5°C | 20.0°C | 13.5°C | 29.5°C | 10.9°C | 105 mm | 65% | 0.4 m/s | — |
| 1982 | 24.5°C | 20.0°C | 15.5°C | 28.1°C | 12.8°C | 230 mm | 81% | 0.3 m/s | — |
| 1981 | 25.6°C | 20.1°C | 14.6°C | 29.8°C | 10.8°C | 216 mm | 74% | 0.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 27°C with lows near 15.6°C (mean 21.3°C), based on 45 years of NASA POWER data.
April averages 213 mm of rainfall in West Siang, about average for rainfall. The wettest on record was 537 mm in 2025.
The hottest April reached 35.9°C in 1999. The coldest dipped to 9°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 0.9°C. Daytime highs moved from 26.4°C to 26.7°C and overnight lows from 15°C to 16.5°C over the same span.
April is close to West Siang's year-round average and about average for rainfall, so plan for around 27°C daytime highs and 15.6°C at night.
Not quite — April is the 6th coolest month in West Siang, averaging 21.3°C.
For April in West Siang, pack light layers you can adjust through the day, with typical highs of 27°C and lows of 15.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 71% — moderately humid.
Average wind speed in April is 0.4 m/s. The windiest April on record averaged 0.4 m/s (1981).
The wettest April on record was 2025 with 537 mm. On average, April sees 213 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 West Siang behaves each April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
