Average Weather in Cordova Alaska, United States
In Cordova, the summers are cool and overcast; the winters are long, freezing, windy, and mostly cloudy; and it is wet year round. Over the course of the year, the temperature typically varies from 21°F to 62°F and is rarely below 2°F or above 69°F.
Based on the tourism score, the best time of year to visit Cordova for warm-weather activities is from early July to mid August.
The warm season lasts for 3.5 months, from May 31 to September 15, with an average daily high temperature above 56°F. The hottest day of the year is July 31, with an average high of 62°F and low of 49°F.
The cold season lasts for 4.2 months, from November 9 to March 15, with an average daily high temperature below 38°F. The coldest day of the year is January 15, with an average low of 21°F and high of 32°F.
Average High and Low Temperature
Average Hourly Temperature
In Cordova, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Cordova begins around February 17 and lasts for 4.4 months, ending around June 28. On March 16, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 35% of the time, and overcast or mostly cloudy 65% of the time.
The cloudier part of the year begins around June 28 and lasts for 7.6 months, ending around February 17. On December 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 76% of the time, and clear, mostly clear, or partly cloudy 24% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Cordova varies throughout the year.
The wetter season lasts 6.0 months, from August 21 to February 21, with a greater than 53% chance of a given day being a wet day. The chance of a wet day peaks at 66% on October 3.
The drier season lasts 6.0 months, from February 21 to August 21. The smallest chance of a wet day is 40% on June 24.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 66% on September 27.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Cordova experiences extreme seasonal variation in monthly rainfall.
Rain falls throughout the year in Cordova. The most rain falls during the 31 days centered around September 24, with an average total accumulation of 15.0 inches.
The least rain falls around June 23, with an average total accumulation of 4.9 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Cordova experiences significant seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.3 months, from October 13 to April 23, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 31, with an average total liquid-equivalent accumulation of 1.5 inches.
The snowless period of the year lasts for 5.7 months, from April 23 to October 13. The least snow falls around July 16, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Cordova varies extremely over the course of the year. In 2017, the shortest day is December 21, with 5 hours, 41 minutes of daylight; the longest day is June 20, with 19 hours, 5 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:12 AM on June 18, and the latest sunrise is 5 hours, 40 minutes later at 9:51 AM on December 26. The earliest sunset is at 3:30 PM on December 16, and the latest sunset is 7 hours, 47 minutes later at 11:17 PM on June 22.
Daylight saving time (DST) is observed in Cordova during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Cordova, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
The average hourly wind speed in Cordova experiences extreme seasonal variation over the course of the year.
The windier part of the year lasts for 6.4 months, from September 24 to April 4, with average wind speeds of more than 10.6 miles per hour. The windiest day of the year is January 8, with an average hourly wind speed of 14.9 miles per hour.
The calmer time of year lasts for 5.6 months, from April 4 to September 24. The calmest day of the year is June 25, with an average hourly wind speed of 6.4 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Cordova is from the east throughout the year.
Cordova is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average water temperature experiences some seasonal variation over the course of the year.
The time of year with warmer water lasts for 2.8 months, from June 23 to September 15, with an average temperature above 53°F. The day of the year with the warmest water is August 1, with an average temperature of 57°F.
The time of year with cooler water lasts for 4.4 months, from December 21 to May 1, with an average temperature below 43°F. The day of the year with the coolest water is March 8, with an average temperature of 39°F.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Cordova throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Cordova for general outdoor tourist activities is from early July to mid August, with a peak score in the last week of July.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Cordova for hot-weather activities is from late June to early July.
The growing season in Cordova typically lasts for 4.4 months (135 days), from around May 13 to around September 25, rarely starting before April 26 or after May 29, and rarely ending before September 8 or after October 11.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Cordova should appear around June 20, only rarely appearing before June 4 or after July 9.
Growing Degree Days
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 2.9 months, from May 2 to July 30, with an average daily incident shortwave energy per square meter above 4.3 kWh. The brightest day of the year is June 18, with an average of 5.3 kWh.
The darker period of the year lasts for 4.4 months, from October 13 to February 23, with an average daily incident shortwave energy per square meter below 1.2 kWh. The darkest day of the year is December 21, with an average of 0.1 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Cordova are 60.543 deg latitude, -145.758 deg longitude, and 154 ft elevation.
The topography within 2 miles of Cordova contains large variations in elevation, with a maximum elevation change of 2,198 feet and an average elevation above sea level of 289 feet. Within 10 miles contains large variations in elevation (3,809 feet). Within 50 miles also contains extreme variations in elevation (7,907 feet).
The area within 2 miles of Cordova is covered by trees (43%), water (37%), and sparse vegetation (13%), within 10 miles by water (40%) and trees (26%), and within 50 miles by water (49%) and snow and glaciers (12%).
This report illustrates the typical weather in Cordova, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Cordova.
For each station, the records are corrected for the elevation difference between that station and Cordova according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Cordova is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Cordova and a given station.
The stations contributing to this reconstruction are: Merle K. (Mudhole) Smith Airport (84%, 18 kilometers, east); Valdez Airport (11%, 71 kilometers, north); and Middleton Island Airport (4.6%, 128 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .