Average Weather in Humboldt Hill California, United States
In Humboldt Hill, the summers are cool, dry, and mostly clear and the winters are long, cold, wet, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 42°F to 64°F and is rarely below 33°F or above 70°F.
Based on the tourism score, the best time of year to visit Humboldt Hill for warm-weather activities is from early July to early September.
The warm season lasts for 3.2 months, from July 7 to October 13, with an average daily high temperature above 62°F. The hottest day of the year is September 11, with an average high of 64°F and low of 50°F.
The cool season lasts for 4.0 months, from November 28 to March 28, with an average daily high temperature below 56°F. The coldest day of the year is December 23, with an average low of 42°F and high of 54°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Humboldt Hill, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.
The clearer part of the year in Humboldt Hill begins around June 1 and lasts for 4.5 months, ending around October 18. On August 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 89% of the time, and overcast or mostly cloudy 11% of the time.
The cloudier part of the year begins around October 18 and lasts for 7.5 months, ending around June 1. On January 9, the cloudiest day of the year, the sky is overcast or mostly cloudy 67% of the time, and clear, mostly clear, or partly cloudy 33% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Humboldt Hill varies significantly throughout the year.
The wetter season lasts 6.1 months, from October 24 to April 27, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 46% on December 4.
The drier season lasts 5.9 months, from April 27 to October 24. The smallest chance of a wet day is 1% on August 3.
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 46% on December 1.
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. Humboldt Hill experiences extreme seasonal variation in monthly rainfall.
The rainy period of the year lasts for 9.3 months, from September 8 to June 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around December 14, with an average total accumulation of 9.1 inches.
The rainless period of the year lasts for 2.7 months, from June 19 to September 8. The least rain falls around July 30, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The length of the day in Humboldt Hill varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 15 minutes of daylight; the longest day is June 21, with 15 hours, 6 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:44 AM on June 14, and the latest sunrise is 2 hours, 5 minutes later at 7:49 AM on November 3. The earliest sunset is at 4:49 PM on December 7, and the latest sunset is 4 hours, 3 minutes later at 8:52 PM on June 27.
Daylight saving time (DST) is observed in Humboldt Hill during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Humboldt Hill, 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
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Humboldt Hill experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 3.1 months, from April 21 to July 23, with average wind speeds of more than 9.3 miles per hour. The windiest day of the year is June 23, with an average hourly wind speed of 10.5 miles per hour.
The calmer time of year lasts for 8.9 months, from July 23 to April 21. The calmest day of the year is September 25, with an average hourly wind speed of 8.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Humboldt Hill varies throughout the year.
The wind is most often from the north for 8.3 months, from March 10 to November 19, with a peak percentage of 83% on July 18. The wind is most often from the south for 3.7 months, from November 19 to March 10, with a peak percentage of 42% on January 1.
Humboldt Hill 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 does not vary significantly over the course of the year, remaining within 2°F of 53°F throughout.
Average Water Temperature
Best Time of Year to Visit
To characterize how pleasant the weather is in Humboldt Hill 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 Humboldt Hill for general outdoor tourist activities is from early July to early September, with a peak score in the first week of August.
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 Humboldt Hill for hot-weather activities is from early September to early October, with a peak score in the last week of September.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Humboldt Hill typically lasts for 11 months (329 days), from around January 29 to around December 24, rarely starting after March 12, or ending before November 25.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Humboldt Hill should appear around February 17, only rarely appearing before January 28 or after April 3.
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 3.3 months, from May 16 to August 26, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is June 30, with an average of 8.1 kWh.
The darker period of the year lasts for 3.8 months, from November 1 to February 22, with an average daily incident shortwave energy per square meter below 2.9 kWh. The darkest day of the year is December 26, with an average of 1.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Humboldt Hill are 40.726 deg latitude, -124.190 deg longitude, and 49 ft elevation.
The topography within 2 miles of Humboldt Hill contains significant variations in elevation, with a maximum elevation change of 646 feet and an average elevation above sea level of 164 feet. Within 10 miles contains significant variations in elevation (2,119 feet). Within 50 miles contains large variations in elevation (6,371 feet).
The area within 2 miles of Humboldt Hill is covered by herbaceous vegetation (48%) and trees (40%), within 10 miles by water (37%) and trees (36%), and within 50 miles by water (49%) and trees (36%).
This report illustrates the typical weather in Humboldt Hill, 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 Humboldt Hill.
For each station, the records are corrected for the elevation difference between that station and Humboldt Hill 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 Humboldt Hill is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Humboldt Hill and a given station.
The stations contributing to this reconstruction are: Arcata-Eureka Airport (86%, 29 kilometers, north); Lonnie Pool Field Weaverville Airport (9%, 107 kilometers, east); and Ukiah Municipal Airport (4.9%, 197 kilometers, southeast).
Time zones for aiports and weather stations are provided by AskGeo.com .