If you're looking for summer vibes, the best time to travel to Narrabri, NSW is in January, December and February, when the average temperature reaches 29.81 °C, while October, August and September are the 3 sunniest months of the year, with an average of 136.61 hours.
If you prefer colder temperatures, however, make sure you visit Narrabri, NSW during the months of July, June and August to experience an average of 5.27 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and April, when the average precipitation in Narrabri, NSW is 3.75 mm, while the months of January, February and March are drier, with an average of 0 mm.