This report describes the historical weather record at the Los Angeles International Airport (Los Angeles, California, United States) during 1965. This station has records back to December 1947.
Los Angeles, California has a mediterranean climate with dry warm summers and mild winters. The area within 25 mi of this station is covered by oceans and seas (43%), built-up areas (40%), shrublands (11%), and forests (5%)
Daylight saving time (DST) was observed at Los Angeles, California during 1965. There were two time changes during 1965:
1965 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1965 was 1964 and the first after was 1968.
The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 1965 they occurred on:
|Spring Equinox||Saturday, 20 March 1965.|
|Summer Solstice||Monday, 21 June 1965.|
|Fall Equinox||Thursday, 23 September 1965.|
|Winter Solstice||Wednesday, 22 December 1965.|
The hottest day of 1965 was October 22, with a high temperature of 99°F. For reference, on that day the average high temperature is 72°F and the high temperature exceeds 81°F only one day in ten. The hottest month of 1965 was October with an average daily high temperature of 78°F.
Relative to the average, the hottest day was October 22. The high temperature that day was 99°F, compared to the average of 72°F, a difference of 27°F. In relative terms the warmest month was October, with an average high temperature of 78°F, compared to an typical value of 73°F.
The longest warm spell was from October 20 to November 2, constituting 14 consecutive days with warmer than average high temperatures. The month of October had the largest fraction of warmer than average days with 52% days with higher than average high temperatures.
The coldest day of 1965 was February 12, with a low temperature of 37°F. For reference, on that day the average low temperature is 51°F and the low temperature drops below 45°F only one day in ten. The coldest month of 1965 was February with an average daily low temperature of 47°F.
Relative to the average, the coldest day was February 12. The low temperature that day was 37°F, compared to the average of 51°F, a difference of 14°F. In relative terms the coldest month was February, with an average low temperature of 47°F, compared to an typical value of 51°F.
The longest cold spell was from June 16 to July 30, constituting 45 consecutive days with cooler than average low temperatures. The month of July had the largest fraction of cooler than average days with 97% days with lower than average low temperatures.
The clearest month of 1965 was October, with 65% of days being more clear than cloudy. The longest spell of clear weather was from February 7 to February 20, constituting 14 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1965 was June, with 70% of days being more cloudy than clear. The longest spell of cloudy weather was from May 27 to June 9, constituting 14 consecutive days that were cloudier than they were clear.
This station reports both the quantity of liquid precipitation and categorical observations of precipitation (e.g., moderate rain, or heavy snow). Both are subject to erroneous reports, but the former is particularly prone to false reports, especially ones indicating an excessive quantity of precipitation. Please bear this in mind when reading the extrema reported in this section.
The day with the largest quantity of precipitation was November 22. That day saw 2.110" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.158". The month with the most precipitation was November, with 6.421", compared to a median value of 0.787".
As determined by quantitative measurements, the longest dry spell was from September 19 to November 14, constituting 57 consecutive days with no measured precipitation. The months May, July, and October were completely without measured precipitation.
The month with the largest fraction of days with at least some measured precipitation was November, with 30% of days reporting some measured precipitation.
This station reports when significant weather events (including precipitation) are visually observed at or near the station. Such events do not always correspond to measured quantities of liquid equivalent precipitation, such as when the event is near by not at the station, or in the case of solid precipitation that does not melt in the collection basin.
The day in 1965 with the most precipitation observations was November 16. There were 24 hourly weather reports that day (out of a maximum of 24) in which some form of precipitation was observated at or near the station. The month with the most precipitation observations was November, with 129 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from October 14 to November 13, constituting 31 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was May, with 94% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was November, with 40% of days reporting some observed precipitation.
Either snow is exceptionally rare at this location or this station did not reliably report it during 1965.
Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.
When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of 1965 was February with an average daily low humidity of 36%, and the most humid month was August with an average daily low humidity of 61%.
But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.
Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.
Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.
To take some examples, and basing our categorization on the daily high dew point in 1965, January had 15 dry days, 16 comfortable days, and no humid days; April had 10 dry days, 20 comfortable days, and no humid days; July had no dry days, 31 comfortable days, and no humid days; and October had 2 dry days, 29 comfortable days, and no humid days.
The highest sustained wind speed was 51 mph, occurring on February 18; the highest daily mean wind speed was 20 mph (December 29);
The windiest month was May, with an average wind speed of 10 mph. The least windy month was January, with an average wind speed of 7 mph.
Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.
The day of 1965 with the lowest average visibility was February 21, with an average visibility of 1.2 mi. The month with the lowest average visibility was August, with an average visibility of 6.3 mi. With an average visibility of 13.5 mi, the month of December had the highest average visibility.
This station did not reliably report the cloud ceiling during 1965.