| January | Medium | Cold, 1 to 10 C, possible snow | Skiing/snow at Snow View Point, honeymooners | Medium | Quiet winter charm, occasional snowfall |
| February | Medium | Cold, 2 to 12 C | Vasantotsav festival late in the month | Medium | Couples wanting a quiet, cool trip |
| March | Medium | Mild, warming up fast | Crowd building as school holidays approach | Medium | Clear skies before the summer rush |
| April | High | Pleasant, 11 to 28 C | School summer break begins | High | Families starting their summer trip early |
| May | Very High | Warm days, cool nights | Peak summer holiday season | Highest | Avoid unless you want the busiest Nainital gets |
| June (up to mid) | Very High | Warm, humid before rains | Summer holidays continuing | Highest | Same as May, still very crowded |
| June (late) | Medium | Humid, rain approaching | Crowd thinning as holidays end | Medium | A calmer window right before monsoon |
| July | Low | Wet, frequent rain | Quiet, some road risk | Low | Budget travellers comfortable with rain |
| August | Low | Heaviest rain, landslide risk | Quietest month of the year | Low | Maximum solitude, prepared for delays |
| September | Low to Medium | Rain easing, greenery peak | Crowds still thin | Low to Medium | Photographers wanting lush, empty views |
| October | Medium to High | Crisp and clear | Sharadotsav festival, Diwali crowd spike | Medium to High | Best all-round weather and views |
| November | Medium | Cooling fast, misty mornings | Calm before winter | Medium | Peaceful pre-winter escape |
| December (1 to 23) | Medium | Cold, occasional snow | Quieter before the holiday rush | Medium | Winter charm without the Christmas crowd |
| December (24 to Jan 1) | High | Cold, festive | Christmas and New Year peak | Highest | Festive atmosphere, if you do not mind crowds |