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Cypress weather by month: averages, rainfall & climate trends

Average temperatures in Cypress follow a clear seasonal rhythm, rising and falling by 31.5°F over the course of the year. No season stands out as markedly wetter. Precipitation arrives fairly evenly year-round. Cypress weather by month: average temperatures, rainfall, extremes and how the climate has changed since 1940.

Today vs average

+2.4°Fhigh near average

83° / 63°Today
81° / 60°Average
see today in detail →

How it's changed

+3.5°Faverage temperature, 2016–2025 vs 1940–1949average temperature vs 1940–497frost days a year now (2016–2025) · 8 in the 1940sfrost days a year · 8 in the 1940s149days above 86°F a year now (2016–2025) · 103 in the 1940sdays above 86°F · 103 in the 1940s+3.5°F vs the 1940s · see how it's changed →
Weather by montha typical year, averaged over the full recordJanuary, rain 3.7 incheshigh 62°low 44°February, rain 3.2 incheshigh 66°low 47°March, rain 3.5 incheshigh 72°low 53°April, rain 4.1 incheshigh 79°low 60°May, rain 4.6 incheshigh 85°low 67°June, rain 3.9 incheshigh 90°low 73°July, rain 3.2 incheshigh 92°low 75°August, rain 3.2 incheshigh 93°low 74°September, rain 3.8 incheshigh 88°low 70°October, rain 3.3 incheshigh 81°low 61°November, rain 3.7 incheshigh 71°low 53°December, rain 3.9 incheshigh 65°low 47°wettest month May, 4.6 inches · 44.1 inches a yearsee month by month →

Right now

What it's doing today vs the historical average for this date.
Overcast

Right now

79.3°

80°feels like
46%humidity
57°dew point
4 mphfrom NE
UV index6.8
sunrise07:28sunset18:45day length11h 17m
TodayMostly clear83°63°
ThuClear86°60°
FriClear85°60°
SatClear84°66°
SunOvercast80°66°
MonOvercast82°64°
TueOvercast84°71°

On this date: October 21

Today (forecast)
83° / 63°
Average for October 21
81° / 60°

High near average · +2.4°F

  • Highest since 1940: 91.7° · 2023
  • Lowest since 1940: 37.7° · 1976
  • One year ago: 91° / 73°

Every October 21 in history, coldest to hottest

▲ Daily highs▼ Daily lows

Dots show daily highs (top) and lows (bottom) for each October 21 on record (n = 87). Outlined dots are today's forecast.

Area we sample

Each city's history comes from one ERA5 grid cell, about 28 km across, shown by the dashed box. Near mountains or coasts, conditions can vary across the cell.

Location & data

Historical weather for Cypress is sampled from the ECMWF ERA5 reanalysis at 29.97°N, 95.70°W, with daily records since 1940.

Coordinates
29.97°N, 95.70°W
Time zone
America/Chicago
Period
1940–2026
Data source
ERA5 (ECMWF)

Last 30 days

27 of the last 31 days were warmer than the historical average for that date. Average difference: +5.1°F.

Each bar is one day, from morning low to afternoon high. Warm-colored bars are days whose mean ran above average; cool bars ran below. The dot inside the bar is the daily mean. The shaded band is the typical 10–90% range expected for that date. Average = the day's mean temperature averaged across every year of record (1940–2026) for that calendar date.

This date over the years

One dot per year, showing the mean temperature on this calendar date. Dots are warmer or cooler than the long-term average (dashed line); the shaded band is the typical 10–90% range, and the highlighted dot is today's forecast. Based on ERA5 reanalysis: modelled estimates, not station readings.

Weather by month

Average temperatures and rainfall for each month: a typical year, from the full record.

Climate overview

The year peaks in August, at around 93.0°F by mid-afternoon, with nights around 74.5°F. On about 170 nights a year, the temperature never drops below 68°F. The coolest month is January, when afternoons reach about 62.1°F and overnight lows sit around 44.0°F.

The yearly total for Cypress comes to about 44.1 inches; monthly amounts range from 3.2 inches in July up to 4.6 inches in May.

Comparing the record's first decade with its most recent one, Cypress now averages 3.5°F warmer than it did in the 1940s. The count of days past 86°F has risen from roughly 105 a year to 150 between the record's first and last decades.

Climate graph (climograph)

August is the warmest month, January the coolest: a yearly swing of 32°F. Wettest month: May (~4.6 in). Whole year averages ~44.1 inches of rain.

Bars = average monthly rainfall (right axis). Lines = average daily high and low (left axis). Average = each month's value averaged across every year of record (1940–2026).

Rainy days by month

About 96 rainy days a year: most in May (~9), fewest in October (~7).

Bars = average number of days with ≥ 0.08 in per month. Hover for the monthly rainfall total.

Monthly wind

Average daily peak wind at 10 m, by month.

Monthly solar energy

Average daily incoming solar energy in megajoules per square metre: the record's own proxy for how sunny the month is.

Cypress month by month: what to expect

Typical conditions for each month, averaged across the full record (since 1940). Daylight is the time from sunrise to sunset. Highest and Lowest are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.

MonthAvg highAvg lowRainRainy daysDaylightHighestLowest
January62.1°44.0°3.7 in810.3 h83.8° (1971)1.5° (1949)
February65.7°47.1°3.2 in711.0 h89.7° (1986)7.3° (2021)
March72.2°53.2°3.5 in811.8 h90.4° (2013)21.7° (2002)
April78.6°60.3°4.1 in812.7 h94.7° (2006)32.4° (1987)
May84.8°67.4°4.6 in913.5 h97.4° (2003)44.3° (2013)
June90.0°72.9°3.9 in913.9 h105.7° (2013)52.9° (1984)
July92.3°74.6°3.2 in913.8 h106.1° (2022)60.5° (1967)
August93.0°74.5°3.2 in913.1 h109.5° (2023)60.3° (1949)
September88.4°70.2°3.8 in812.2 h107.3° (2000)48.1° (1967)
October81.4°61.4°3.3 in711.3 h97.1° (2024)30.6° (1993)
November71.4°52.5°3.7 in710.5 h88.9° (1988)23.5° (1976)
December64.6°46.5°3.9 in810.1 h84.2° (2021)6.6° (1989)

How it's changed

Year-by-year signals from 1940 to today.

Climate stripes

Annual mean shifted from 1940–1949 to 2016–2025 by +3.5°F.

Each vertical stripe is one year. Color encodes how much that year's annual mean differed from the long-term average. Average = each year's annual mean compared to the average of all years (1940–2026). cooler ← → warmer

Annual mean temperature

Long-term trend: +0.38°F per decade.

One point per year, showing the temperature averaged across the whole year. The dashed line is the least-squares long-term trend. Based on ERA5 reanalysis: modelled estimates, not station readings.

Seasonal warming

Mar–May is warming fastest: +0.48°F per decade.

Each faint line is one three-month period's average per year; the bold dashed line is its long-term trend. Different parts of the year often warm at different rates. Based on ERA5 reanalysis: modelled estimates, not station readings.

Hot days vs frost days

Days ≥ 86°F per year: 102.8 early in the record → 148.7 recently. Frost days: 8 → 7.

Thin lines are raw yearly counts; thick lines are the smoothed trend that removes year-to-year noise. The hot-day threshold is auto-picked per city so the line actually moves. Average = a centered 5-year rolling average to smooth weather noise.

Yearly hot & cold extremes

Hottest day since 1940 in 2023, coldest in 1949: 109.5°F / 1.5°F.

One point per year: the single hottest and coldest day recorded that year.

Annual rainfall

~44.1 in/year on average. Last decade: +16% vs that average. Long-term trend: +0.59 in per decade.

One bar per year of total rainfall. Dashed line is the long-term average. Average = the average annual rainfall across every year of record (1940–2026).

Day-by-day grid

Each tiny square is one calendar day across the full record, about 30,000 days per city. Use the mode switch above the chart: Anomaly colors each day by how far it ran from the historical average for that date (red = warmer, blue = cooler), Daily mean temp shows the absolute mean temperature for the day (useful to see seasons and heatwaves), and Precipitation shows daily rainfall (useful to spot wet/dry seasons and droughts). Average = the long-term average for that calendar date (1940–2026).

Frequently asked questions about Cypress

Which is the warmest month in Cypress?
On long-term average, the warmest month in Cypress is August (mean daily temperature of about 83.0°F) and the coolest is January (about 51.5°F).
How does today's temperature in Cypress compare to the historical average?
On October 21, 2026, Cypress is forecast to reach a high of 83.1°F and a low of 63.3°F. The long-term average for this date (the full record since 1940) is a high of 80.7°F and a low of 60.1°F, so today's high is 2.4°F warmer than that average.
How much has Cypress warmed since 1940?
Comparing the first decade of the record (1940–1949) with the most recent (2016–2025), the annual mean temperature in Cypress is about 3.5°F warmer.
How much does it rain in Cypress?
Cypress receives about 44.1 inches of precipitation per year on long-term average, with May typically the wettest month.
What is the average temperature in Cypress?
Over the full record (since 1940), the annual mean temperature in Cypress is about 68.5°F. The warmest month is August and the coolest is January.
What are the average temperatures in Cypress by month?
Average daily highs and lows for each month in Cypress (°F, full record since 1940): January 62°/44°, February 66°/47°, March 72°/53°, April 79°/60°, May 85°/67°, June 90°/73°, July 92°/75°, August 93°/74°, September 88°/70°, October 81°/61°, November 71°/53°, December 65°/47°.
What is the weather like in Cypress in summer?
Summer in Cypress (June to August) is hot. Expect 90–93°F by day and 73–75°F at night, with August the warmest month. Rain is steady at around 3.4 inches a month, spread over roughly 9 days.
What is the weather like in Cypress in winter?
In winter, December through February, Cypress is fairly mild. Daytime highs sit at 62–66°F and nights at 44–47°F; January is the coldest month. Rain falls on about 8 days a month, adding up to around 3.6 inches.
What is the weather like in Cypress in spring?
March to May is spring in Cypress, and it is wet and pleasantly warm. It warms from 72°F by day and 53°F at night in March to 85°F and 67°F in May. Rain is steady at around 4.1 inches a month, spread over roughly 8 days.
What is the weather like in Cypress in autumn?
Autumn in Cypress (September to November) is warm. September still brings 88°F afternoons and 70°F nights, November only 71°F and 53°F. Rain falls on about 7 days a month, adding up to around 3.6 inches.
How many days a year does it rain in Cypress?
On long-term average, Cypress has about 96 days a year with at least 0.08 inches of rain or snow. The annual total is roughly 44.1 inches.

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