Average Weather in October in Hamilton New Zealand
Daily low temperatures increase by 2°F, from 48°F to 51°F, rarely falling below 40°F or exceeding 57°F.
For reference, on February 4, the hottest day of the year, temperatures in Hamilton typically range from 59°F to 76°F, while on July 15, the coldest day of the year, they range from 42°F to 56°F.
Average High and Low Temperature in October
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, 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 October
The month of October in Hamilton experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 44% throughout the month.
The clearest day of the month is October 26, with clear, mostly clear, or partly cloudy conditions 57% of the time.
For reference, on July 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 48%, while on March 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 69%.
Cloud Cover Categories in October
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Hamilton, the chance of a wet day over the course of October is rapidly decreasing, starting the month at 34% and ending it at 26%.
For reference, the year's highest daily chance of a wet day is 39% on July 8, and its lowest chance is 22% on February 11.
Probability of Precipitation in October
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during October in Hamilton is decreasing, starting the month at 2.9 inches, when it rarely exceeds 5.2 inches or falls below 1.3 inches, and ending the month at 2.3 inches, when it rarely exceeds 3.9 inches or falls below 0.9 inches.
Average Monthly Rainfall in October
Over the course of October in Hamilton, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 11 minutes, implying an average daily increase of 2 minutes, 21 seconds, and weekly increase of 16 minutes, 29 seconds.
The shortest day of the month is October 1, with 12 hours, 27 minutes of daylight and the longest day is October 31, with 13 hours, 38 minutes of daylight.
Hours of Daylight and Twilight in October
The latest sunrise of the month in Hamilton is 6:55 AM on October 1 and the earliest sunrise is 42 minutes earlier at 6:13 AM on October 31.
The earliest sunset is 7:22 PM on October 1 and the latest sunset is 29 minutes later at 7:51 PM on October 31.
Daylight saving time is observed in Hamilton during 2018, but it neither starts nor ends during October, so the entire month is in daylight saving time.
For reference, on December 21, the longest day of the year, the Sun rises at 5:53 AM and sets 14 hours, 47 minutes later, at 8:40 PM, while on June 21, the shortest day of the year, it rises at 7:34 AM and sets 9 hours, 33 minutes later, at 5:06 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in October
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The chance that a given day will be muggy in Hamilton is essentially constant during October, remaining around 0% throughout.
The lowest chance of a muggy day during October is 0% on October 16.
For reference, on February 9, the muggiest day of the year, there are muggy conditions 9% of the time, while on June 27, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in October
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Hamilton is gradually decreasing during October, decreasing from 11.8 miles per hour to 10.9 miles per hour over the course of the month.
For reference, on October 8, the windiest day of the year, the daily average wind speed is 11.9 miles per hour, while on April 4, the calmest day of the year, the daily average wind speed is 9.1 miles per hour.
The highest daily average wind speed during October is 11.9 miles per hour on October 8.
Average Wind Speed in October
Wind Direction in October
Hamilton 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 surface water temperature in Hamilton is gradually increasing during October, rising by 2°F, from 58°F to 60°F, over the course of the month.
Average Water Temperature in October
Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).
The growing season in Hamilton typically lasts for 9.8 months (298 days), from around August 18 to around June 11, rarely starting after September 17, or ending before May 20.
The month of October in Hamilton is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season gradually increasing from 94% to 97% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in October
Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Hamilton are increasing during October, increasing by 210°F, from 269°F to 478°F, over the course of the month.
Growing Degree Days in October
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Hamilton is increasing during October, rising by 1.4 kWh, from 4.8 kWh to 6.2 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in October
For the purposes of this report, the geographical coordinates of Hamilton are -37.783 deg latitude, 175.283 deg longitude, and 141 ft elevation.
The topography within 2 miles of Hamilton contains only modest variations in elevation, with a maximum elevation change of 180 feet and an average elevation above sea level of 140 feet. Within 10 miles contains only modest variations in elevation (551 feet). Within 50 miles contains significant variations in elevation (3,327 feet).
The area within 2 miles of Hamilton is covered by grassland (44%), artificial surfaces (39%), and trees (10%), within 10 miles by cropland (80%), and within 50 miles by cropland (36%) and trees (30%).
This report illustrates the typical weather in Hamilton year round, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Hamilton.
For each station, the records are corrected for the elevation difference between that station and Hamilton 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 Hamilton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hamilton and a given station.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.
We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.