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Castle Rock (WA) Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Castle Rock’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.

Monthly Temperature Averages

With significant temperature fluctuations, Castle Rock enjoys distinct seasons year-round. Average maximum daytime temperatures reach a comfortable 26°C in August. In December, the coolest month of the year, temperatures drop to a chilly 7°C. At night, minimum temperatures can drop even lower, averaging around 1°C.

The chart below illustrates the average maximum day and minimum night temperatures in Castle Rock by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest. August, the city’s warmest month receives 299 hours of sunshine.

The chart below shows the average temperature throughout the year:

December, the city’s coldest month, receives about 206 mm of rainfall spread over roughly 23 days. For more information, please visit our Castle Rock Precipitation page.

Annual Temperatures in the United States of America Compared

The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.

Annual
Map not visible? Whoops sorry! Please refresh the page.
Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

Castle Rock Temperatures Compared World Wide

Castle Rock’s average annual maximum temperature is 16°C. Let’s compare this with some popular tourist destinations:

Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.

In contrast, in Reykjavík, Iceland, the average annual temperature is significantly lower at 9°C, with mild summers and cold winters.

Boston, USA, experiences seasonal shifts similar to New York, with an average annual temperature of 16°C.

In Brisbane, Australia, the average annual temperature is 26°C, making it warmer than Sydney.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Temperatures in the Mountains

Although not all regions have mountains, elevated areas exhibit distinct temperature variations.

  • Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
  • Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.

For more detailed information about Castle Rock’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Castle Rock climate page.


Current temperature in Castle Rock (WA)

Sat   Dec 28
11°C | 7°C
SW 5 m/s
7.1 mm
broken clouds and rain

broken clouds and rain

Sun   Dec 29
8°C | 5°C
SW 6 m/s
9.5 mm
broken clouds and rain

broken clouds and rain

Mon   Dec 30
8°C | 4°C
S 4 m/s
0.9 mm
broken clouds and slight rain

broken clouds and slight rain

Interested in more climate information?

This site provides you with all the information you need about the climate in Castle Rock.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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