Climate Chart of Hawaii Big Island, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Hawaii Big Island, USA, the climate data describe 2013–2023. Monthly mean temperatures range from February at 9.1 °C to July at 13.1 °C, providing a broad sense of the year’s cooler and warmer monthly averages. Daily sunshine duration also varies across the year, while rainfall and snowfall figures describe mean daily amounts rather than monthly totals. These averages help outline the pattern, but do not specify the conditions on any particular day.

Climate overview

Temperature

The coolest monthly mean temperature is in February, at 9.1 °C; the warmest is in July, at 13.1 °C. These are monthly averages, not daytime maximum temperatures, so they do not show the full range visitors may encounter within a day. Across calendar-month means, the unweighted mean is 11.2 °C, a year-level summary rather than a day-weighted annual average.

Rain

Mean daily rainfall is lowest in January, at 1.70 mm/day, and highest in August, at 5.68 mm/day. The figures are daily averages for each month, not monthly rainfall totals; the lowest monthly mean does not guarantee rain-free days or reveal how often rain occurs. The unweighted mean across monthly means is 2.89 mm/day, which summarizes the pattern without describing any particular day.

Sunshine

Mean daily sunshine duration reaches its highest monthly value in June, at 11.99 hours/day, and its lowest in December, at 9.27 hours/day. For planning outdoor time, these averages indicate how sunshine duration varies through the year, but they do not predict conditions on an individual day and are not measures of day length. The unweighted mean of the monthly values is 10.54 hours/day.

Snow

The highest monthly mean daily snowfall is recorded in February, at 0.08 mm/day; the unweighted mean across monthly means is 0.02 mm/day. These are small average daily amounts, but they do not establish how many days have snowfall, snow depth, snow cover, or whether conditions suit skiing.

Best Travel Time Guide for Hawaii Big Island, USA: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, January is the conditional option in these data, with mean daily rainfall of 1.70 mm/day. This does not guarantee dry weather or indicate rain frequency, so keep plans flexible rather than treating the monthly average as a forecast. Visitors who prefer cooler monthly averages can use February as a reference, when the monthly mean temperature is 9.1 °C; this is not a daytime high or a promise about daily conditions. For sunshine-based outdoor planning, the mean daily duration is highest in June at 11.99 hours/day and lowest in December at 9.27 hours/day. Sunshine duration is not day length, and neither value guarantees the sunshine on a chosen date. Rain preparation is especially relevant when considering August, which has the highest mean daily rainfall at 5.68 mm/day. The average cannot tell you whether rain will fall during a particular outing, so practical plans should allow for changing conditions.

Climate Data Overview for Hawaii Big Island, USA

Explore the comprehensive climate data for Hawaii Big Island, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	9.8	1.70	0.07	9.73
Feb	9.1	2.71	0.08	9.87
Mar	9.6	3.35	0.01	9.93
Apr	10.4	2.71	0.01	10.72
May	11.2	3.00	0.00	11.15
Jun	12.2	2.00	0.00	11.99
Jul	13.1	3.28	0.00	11.88
Aug	13.0	5.68	0.00	11.04
Sep	12.6	3.24	0.00	10.92
Oct	12.3	2.65	0.00	10.29
Nov	11.1	2.03	0.00	9.65
Dec	10.1	2.37	0.01	9.27
Average	11.2	2.89	0.02	10.54