Climate guideThirty-year normals for Ilām
Ilām climate by month
Subtropical highland · CwbBest Feb · Nov–Dec
Annual mean17°day and night
Seasonal swing11°warmest vs coolest
Precipitation2,588 mm163 wet days a year
26.91° N, 87.93° EElevation 1,218 mUTC+5:45 · Nepal Time
When to goIlām · weather score
Best timeFeb · Nov–Dec
October: high / low22° / 14°
iSummary
What the weather is like
Ilām has a subtropical highland climate (Köppen Cwb): a dry winter and a wetter summer.
The warmest month is June, when afternoons average 25° and nights 19°. January is the coolest month, with highs of 15° and lows of 6°. The difference between the warmest and the coolest month is about 11°.
About 2,588 mm of precipitation falls in an average year. July is the wettest month (713 mm, 30 wet days) and December the driest (10 mm, 1 wet days). Cloud cover ranges from 17% in November to 69% in July.
Compared with Kathmandu, the capital, Ilām is 1.5° cooler on a June afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 25° · June
- Coldest nights
- 6° · January
- Wettest month
- July
- Driest month
- December
- Clearest skies
- November · 17% cloud
- Longest day
- 13 h 49 min
- Shortest day
- 10 h 28 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 15° | 17° | 22° | 24° | 25° | 25° | 24° | 24° | 24° | 22° | 20° | 17° |
| Average low | 6° | 7° | 10° | 13° | 16° | 19° | 19° | 19° | 18° | 14° | 10° | 7° |
| Precipitation | 18 mm | 21 mm | 38 mm | 92 mm | 212 mm | 446 mm | 713 mm | 540 mm | 375 mm | 106 mm | 17 mm | 10 mm |
| Wet days (≥1 mm) | 1.3 | 2 | 6.2 | 13.3 | 21.2 | 25.6 | 30.1 | 28.9 | 23.8 | 9 | 1.1 | 0.7 |
| Cloud cover | 24% | 23% | 21% | 21% | 25% | 49% | 69% | 67% | 48% | 21% | 17% | 20% |
| Daylight | 10h 37 | 11h 15 | 11h 58 | 12h 47 | 13h 27 | 13h 49 | 13h 41 | 13h 07 | 12h 20 | 11h 33 | 10h 50 | 10h 28 |
| Month score | 82 | 91 | 85 | 69 | 67 | 59 | 51 | 52 | 60 | 79 | 97 | 91 |
ivMonth by month
Ilām in every month
January82
15° / 6°
18 mm · 1.3 wet day
February91
17° / 7°
21 mm · 2 wet days
March85
22° / 10°
38 mm · 6.2 wet days
April69
24° / 13°
92 mm · 13.3 wet days
May67
25° / 16°
212 mm · 21.2 wet days
June59
25° / 19°
446 mm · 25.6 wet days
July51
24° / 19°
713 mm · 30.1 wet days
August52
24° / 19°
540 mm · 28.9 wet days
September60
24° / 18°
375 mm · 23.8 wet days
October79
22° / 14°
106 mm · 9 wet days
November97
20° / 10°
17 mm · 1.1 wet day
December91
17° / 7°
10 mm · 0.7 wet day