Climate Chart of Olympia, USA
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Olympia, USA, the climate data describe 2013–2023. Monthly mean temperatures span from December at 4.8 °C to August at 19.9 °C, with an unweighted mean across monthly means of 11.5 °C. The annual pattern also includes marked variation in daily rainfall and sunshine averages, alongside a recorded snowfall peak. These averages offer a useful broad picture, but they do not describe the conditions of every individual day.
Climate overview
Temperature
Monthly mean temperatures are lowest in December, at 4.8 °C, and highest in August, at 19.9 °C. The unweighted mean across the calendar-month means is 11.5 °C. These figures describe monthly averages rather than daytime highs, so actual days can differ from the broad pattern they show.
Rain
Mean daily rainfall is lowest in July, at 0.30 mm/day, and reaches its highest monthly mean in November, at 6.01 mm/day. The unweighted mean across monthly means is 3.32 mm/day. These are daily average amounts, not monthly totals; they do not show how often rain falls or guarantee that a particular day will be dry or wet.
Sunshine
Mean daily sunshine duration peaks in July at 12.40 hours/day, while the lowest monthly mean is in December at 3.27 hours/day. The unweighted mean across monthly means is 7.75 hours/day. These figures describe average sunshine duration, not day length, and cannot specify the conditions on an individual sightseeing day.
Snow
The highest monthly mean for daily snowfall occurs in February, at 3.87 mm/day; the unweighted mean across monthly means is 0.70 mm/day. These are average daily amounts and do not establish how many days have snow, snow depth, or whether snow cover is present.
Best Travel Time Guide for Olympia, USA: Ideal Seasons and Weather Insights
For visitors prioritising lower average rainfall, July is a conditional option: its mean daily rainfall is 0.30 mm/day. That average does not guarantee dry days or indicate rain frequency, so retain flexible plans and bring rain protection if needed. By contrast, mean daily rainfall reaches 6.01 mm/day in November, a useful cue to prepare for wetter average conditions rather than assume every day will be rainy. If cooler monthly mean temperatures are the priority, December is the relevant reference, with a mean of 4.8 °C; this is not a daytime maximum and does not predict the temperature on a specific visit. For daylight outdoor planning, sunshine averages are highest in July at 12.40 hours/day and lowest in December at 3.27 hours/day. Sunshine duration is not day length, and these separate criteria do not amount to a single best-time ranking.
Snowfall's highest monthly mean is 3.87 mm/day in February. Treat that as an average daily amount only: it cannot tell you how many snowy days to expect or establish snow depth or cover, so it is not a measure of skiing conditions.
Climate Data Overview for Olympia, USA
Explore the comprehensive climate data for Olympia, 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 | 5.2 | 5.72 | 1.16 | 3.84 |
| Feb | 5.2 | 4.16 | 3.87 | 4.80 |
| Mar | 7.2 | 4.09 | 0.52 | 6.88 |
| Apr | 9.7 | 3.33 | 0.44 | 8.68 |
| May | 13.8 | 1.73 | 0.00 | 10.22 |
| Jun | 16.5 | 1.35 | 0.00 | 11.59 |
| Jul | 19.5 | 0.30 | 0.00 | 12.40 |
| Aug | 19.9 | 0.72 | 0.00 | 11.28 |
| Sep | 16.5 | 2.35 | 0.00 | 9.01 |
| Oct | 11.9 | 4.18 | 0.00 | 6.56 |
| Nov | 7.4 | 6.01 | 0.32 | 4.50 |
| Dec | 4.8 | 5.85 | 2.05 | 3.27 |
| Average | 11.5 | 3.32 | 0.70 | 7.75 |
