| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | 30.1° | 20.9° | 23mm | 2.6 | 82 |
| February | 31.9° | 21.8° | 0.9mm | 0.3 | 80 |
| March | 34.1° | 24° | 4.1mm | 0.4 | 71 |
| April | 35.8° | 26.3° | 30.8mm | 2.4 | 60 |
| May | 38.6° | 27.7° | 73.8mm | 3.4 | 47 |
| June | 37.8° | 27.6° | 86mm | 6.3 | 44 |
| July | 36° | 25.9° | 85.1mm | 11.5 | 41 |
| August | 35° | 25.3° | 169.2mm | 15.5 | 38 |
| September | 34.6° | 25.4° | 140.2mm | 12.4 | 45 |
| October | 32.7° | 24.6° | 238mm | 14.7 | 48 |
| November | 30.7° | 23.1° | 484mm | 17.8 | 55 |
| December | 29.6° | 21.7° | 136mm | 7.7 | 74 |
January in Poonamalle averages a daily high of 30.1°C with nights around 20.9°C. Rain is rare — about 2.6 wet days and 23mm across the month. Comfortable conditions for being outdoors all day.
February in Poonamalle averages a daily high of 31.9°C with nights around 21.8°C. Rain is rare — about 0.3 wet days and 0.9mm across the month. Comfortable conditions for being outdoors all day.
March in Poonamalle averages a daily high of 34.1°C with nights around 24°C. Rain is rare — about 0.4 wet days and 4.1mm across the month. Generally workable, with some weather to plan around.
April in Poonamalle averages a daily high of 35.8°C with nights around 26.3°C. Rain is rare — about 2.4 wet days and 30.8mm across the month. Generally workable, with some weather to plan around.
May in Poonamalle averages a daily high of 38.6°C with nights around 27.7°C. Expect roughly 3.4 wet days totalling 73.8mm. Demanding conditions — pack for it and plan indoor options.
June in Poonamalle averages a daily high of 37.8°C with nights around 27.6°C. Expect roughly 6.3 wet days totalling 86mm. Demanding conditions — pack for it and plan indoor options.
July in Poonamalle averages a daily high of 36°C with nights around 25.9°C. Expect roughly 11.5 wet days totalling 85.1mm. Demanding conditions — pack for it and plan indoor options.
August in Poonamalle averages a daily high of 35°C with nights around 25.3°C. Expect roughly 15.5 wet days totalling 169.2mm. Demanding conditions — pack for it and plan indoor options.
September in Poonamalle averages a daily high of 34.6°C with nights around 25.4°C. Expect roughly 12.4 wet days totalling 140.2mm. Demanding conditions — pack for it and plan indoor options.
October in Poonamalle averages a daily high of 32.7°C with nights around 24.6°C. Expect roughly 14.7 wet days totalling 238mm. Demanding conditions — pack for it and plan indoor options.
November in Poonamalle averages a daily high of 30.7°C with nights around 23.1°C. Expect roughly 17.8 wet days totalling 484mm. Generally workable, with some weather to plan around.
December in Poonamalle averages a daily high of 29.6°C with nights around 21.7°C. Expect roughly 7.7 wet days totalling 136mm. Generally workable, with some weather to plan around.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Poonamalle peaks at 82.
Based on 30 years of records, December–February scores highest for comfort in Poonamalle, balancing daytime temperature against rainfall.
May is the warmest, averaging a daily high of 38.6°C.
November is the wettest, averaging 484mm of rain across roughly 17.8 wet days.
December is the coolest month, with average daily highs around 29.6°C.