The highest temperature was just 38.9 degrees Celsius recorded on January 2.

Last month was considerably cooler than most Januarys and even had a bonus for farmers with five thunderstorms delivering a substantial 93.6 millimetres in the city.

Those five thunderstorms helped deliver exactly what Wagga missed out on in 2014 - with last year's average rainfall short by 93 millimetres.

A total of 29.6 mm was recorded on just one day - January 10.

Technical officer at Wagga's Bureau of Meteorology Bruce Copplestone said the rainfall was more than double the monthly January average of 39.8mm.

"The inland rain has been coming down from the Kimberly and central Australia ... there's farmers who have called in and said the rain has been most welcome," Mr Copplestone said.

"It's a good little stock up for the start of the year."

However, it's not just the rainfall which has been different for January.

The long-term average maximum temperature is 31.7 degrees, but the first 31 days of 2015 it averaged out to just 30.7 degrees.

Mr Copplestone said while the maximum had fallen short - the average minimum had jumped to 17.1 from 16.3 degrees.

"There's been more cloud cover overnight which has contributed to warmer nights," he said.

Despite a lack of 40 degree days, Mr Copplestone said February could begin to deliver on that front with five days traditionally topping more than 35 degrees.

Highest temperature: 38.9 degrees Celsius on January 2

Lowest temperature: 9 degrees on January 30

Total monthly rainfall: 93.6mm

Highest daily rainfall: 29.6mm on January 10