This report describes the historical weather record at the Tampa International Airport (Tampa, Florida, United States) during 1963. This station has records back to January 1948.
Tampa, Florida has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by croplands (47%), oceans and seas (27%), built-up areas (14%), forests (6%), and grasslands (6%)
Daylight saving time (DST) was observed at Tampa, Florida during 1963. There were two time changes during 1963:
1963 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1963 was 1960 and the first after was 1964.
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 1963 they occurred on:
|Spring Equinox||Thursday, 21 March 1963.|
|Summer Solstice||Saturday, 22 June 1963.|
|Fall Equinox||Monday, 23 September 1963.|
|Winter Solstice||Sunday, 22 December 1963.|
The hottest day of 1963 was August 6, with a high temperature of 95°F. For reference, on that day the average high temperature is 90°F and the high temperature exceeds 93°F only one day in ten. The hottest month of 1963 was August with an average daily high temperature of 90°F.
Relative to the average, the hottest day was January 19. The high temperature that day was 79°F, compared to the average of 69°F, a difference of 10°F. In relative terms the warmest month was March, with an average high temperature of 77°F, compared to an typical value of 76°F.
The longest warm spell was from November 17 to November 29, constituting 13 consecutive days with warmer than average high temperatures. The month of October had the largest fraction of warmer than average days with 71% days with higher than average high temperatures.
The coldest day of 1963 was December 19, with a low temperature of 32°F. For reference, on that day the average low temperature is 53°F and the low temperature drops below 41°F only one day in ten. The coldest month of 1963 was December with an average daily low temperature of 45°F.
Relative to the average, the coldest day was November 3. The low temperature that day was 38°F, compared to the average of 62°F, a difference of 24°F. In relative terms the coldest month was December, with an average low temperature of 45°F, compared to an typical value of 54°F.
The longest cold spell was from September 30 to October 24, constituting 25 consecutive days with cooler than average low temperatures. The month of December had the largest fraction of cooler than average days with 90% days with lower than average low temperatures.
The clearest month of 1963 was October, with 84% of days being more clear than cloudy. The longest spell of clear weather was from October 4 to October 23, constituting 20 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1963 was November, with 37% of days being more cloudy than clear. The longest spell of cloudy weather was from January 12 to January 17, constituting 6 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 10. That day saw 3.921" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.097". The month with the most precipitation was July, with 8.118", compared to a median value of 5.831".
As determined by quantitative measurements, the longest dry spell was from April 8 to May 1, constituting 24 consecutive days with no measured precipitation. The month with the largest fraction of dry days was April, with 97% of days reporting no measured precipitation at all.
The month with the largest fraction of days with at least some measured precipitation was June, with 53% 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 1963 with the most precipitation observations was November 10. There were 17 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 February, with 90 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from October 9 to November 5, constituting 28 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was October, 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 August, with 68% of days reporting some observed precipitation.
Either snow is exceptionally rare at this location or this station did not reliably report it during 1963.
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 1963 was October with an average daily low humidity of 43%, and the most humid month was February with an average daily low humidity of 59%.
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 1963, January had 7 dry days, 21 comfortable days, and 3 humid days; April had 1 dry day, 18 comfortable days, and 11 humid days; July had no dry days, no comfortable days, and 31 humid days; and October had 2 dry days, 17 comfortable days, and 12 humid days.
The highest sustained wind speed was 39 mph, occurring on November 29; the highest daily mean wind speed was 25 mph (November 29);
The windiest month was February, with an average wind speed of 13 mph. The least windy month was August, with an average wind speed of 8 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 1963 with the lowest average visibility was December 14, with an average visibility of 3.3 mi. The month with the lowest average visibility was February, with an average visibility of 9.7 mi. With an average visibility of 12.0 mi, the month of July had the highest average visibility.
This station did not reliably report the cloud ceiling during 1963.