2025 Compare Climate & Weather:
Katy, TX vs Waterloo, IA

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Highlights

On average, there are 194 sunny days per year in Waterloo. Katy averages 208 sunny days per year. The US average is 205 sunny days.

Waterloo, Iowa gets 35.7 inches of rain, on average, per year. Katy, Texas gets 48 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Waterloo averages 33.9 inches of snow per year. Katy averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Waterloo, Iowa
Summer High: the July high is around 83.4 degrees
Winter Low: the January low is 8.4
Rain: averages 35.7 inches of rain a year
Snow: averages 33.9 inches of snow a year

Katy, Texas
Summer High: the July high is around 93.9 degrees
Winter Low: the January low is 42.5
Rain: averages 48 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

Waterloo

The annual BestPlaces Comfort Index for Waterloo is 6.7 (10=best), which means it is less comfortable than most places in Iowa.

6.7 / 10

June, August and September are the most pleasant months in Waterloo, while January and December are the least comfortable months.

Katy

The annual BestPlaces Comfort Index for Katy is 6.7 (10=best), which means it is less comfortable than most places in Texas.

6.7 / 10

April, October and March are the most pleasant months in Katy, while August and July are the least comfortable months.

Average Monthly High / Low (°F)

Month	Katy, TX	Waterloo, IA
January	63° / 43°	26° / 8°
February	66° / 46°	31° / 13°
March	73° / 52°	44° / 25°
April	80° / 59°	59° / 37°
May	86° / 67°	71° / 48°
June	91° / 73°	80° / 58°
July	94° / 75°	83° / 62°
August	95° / 74°	81° / 60°
September	90° / 69°	74° / 50°
October	82° / 61°	61° / 38°
November	73° / 52°	45° / 26°
December	65° / 44°	30° / 13°

Hot, Freezing, Rainy, Snowy Days: Katy / Waterloo

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	4 / 30	8 / 7	0 / 6
February	0 / 0	2 / 26	8 / 7	0 / 5
March	0 / 0	1 / 23	7 / 9	0 / 3
April	1 / 0	0 / 9	5 / 10	0 / 1
May	7 / 0	0 / 1	7 / 12	0 / 0
June	20 / 3	0 / 0	8 / 11	0 / 0
July	26 / 5	0 / 0	7 / 9	0 / 0
August	27 / 3	0 / 0	8 / 9	0 / 0
September	17 / 1	0 / 1	7 / 8	0 / 0
October	4 / 0	0 / 9	7 / 8	0 / 0
November	0 / 0	1 / 22	7 / 8	0 / 2
December	0 / 0	3 / 30	8 / 8	0 / 6

August is the hottest month for Katy with an average high temperature of 94.6°, which ranks it as cooler than most places in Texas. In Katy, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Katy are April, October and November.

July is the hottest month for Waterloo with an average high temperature of 83.4°, which ranks it as cooler than most places in Iowa. In Waterloo, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Waterloo are June, August and September.

January has the coldest nighttime temperatures for Katy with an average of 42.5°. This is warmer than most places in Texas.

January has the coldest nighttime temperatures for Waterloo with an average of 8.4°. This is colder than most places in Iowa.

In Katy, there are 102.1 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

In Waterloo, there are 11.5 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Katy, there are 9.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.

In Waterloo, there are 150.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Katy, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.

In Waterloo, there are 21.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

October is the wettest month in Katy with 4.8 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Winter with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 48.0 inches in Katy means that it is wetter than most places in Texas.

June is the wettest month in Waterloo with 5.2 inches of rain, and the driest month is January with 0.9 inches. The wettest season is Autumn with 41% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 35.7 inches in Waterloo means that it is about average compared to other places in Iowa.

June is the rainiest month in Katy with 8.4 days of rain, and April is the driest month with only 5.2 rainy days. There are 86.8 rainy days annually in Katy, which is rainier than most places in Texas. The rainiest season is Spring when it rains 27% of the time and the driest is Summer with only a 22% chance of a rainy day.

May is the rainiest month in Waterloo with 11.9 days of rain, and February is the driest month with only 6.5 rainy days. There are 105.3 rainy days annually in Waterloo, which is rainier than most places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 20% chance of a rainy day.

There is rarely any recorded snowfall in Katy, ranking it as one of the least snowy places in Texas.

An annual snowfall of 33.9 inches in Waterloo means that it is snowier than most places in Iowa.

Any measurable snowfall is a rare occurance in Katy.

December is the snowiest month in Waterloo with 9.6 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Katy 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

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Reviews for Waterloo 2 Reviews

Jill · Sherman Oaks, CA

re:

Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't More

| Reply

NC For Me · Apex, NC

re:

Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but More

| Reply

Start Your Review of Waterloo

See all reviews

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2025 Compare Climate & Weather:
Katy, TX vs Waterloo, IA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Katy / Waterloo

January has the coldest nighttime temperatures for Katy with an average of 42.5°. This is warmer than most places in Texas.

January has the coldest nighttime temperatures for Waterloo with an average of 8.4°. This is colder than most places in Iowa.

In Katy, there are 102.1 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

In Waterloo, there are 11.5 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Katy, there are 9.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.

In Waterloo, there are 150.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Katy, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.

In Waterloo, there are 21.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

There is rarely any recorded snowfall in Katy, ranking it as one of the least snowy places in Texas.

An annual snowfall of 33.9 inches in Waterloo means that it is snowier than most places in Iowa.

Any measurable snowfall is a rare occurance in Katy.

December is the snowiest month in Waterloo with 9.6 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Katy 2 Reviews

Reviews for Waterloo 2 Reviews

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2025 Compare Climate & Weather:Katy, TX vs Waterloo, IA

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Katy / Waterloo

January has the coldest nighttime temperatures for Katy with an average of 42.5°. This is warmer than most places in Texas.January has the coldest nighttime temperatures for Waterloo with an average of 8.4°. This is colder than most places in Iowa.

In Katy, there are 102.1 days annually when the high temperature is over 90°, which is hotter than most places in Texas.In Waterloo, there are 11.5 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Katy, there are 9.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.In Waterloo, there are 150.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Katy, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.In Waterloo, there are 21.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

There is rarely any recorded snowfall in Katy, ranking it as one of the least snowy places in Texas.An annual snowfall of 33.9 inches in Waterloo means that it is snowier than most places in Iowa.

Any measurable snowfall is a rare occurance in Katy.December is the snowiest month in Waterloo with 9.6 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Katy 2 Reviews

Reviews for Waterloo 2 Reviews

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Zips In Katy, Texas

Zips In WATERLOO, IOWA

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2025 Compare Climate & Weather:
Katy, TX vs Waterloo, IA

January has the coldest nighttime temperatures for Katy with an average of 42.5°. This is warmer than most places in Texas.

January has the coldest nighttime temperatures for Waterloo with an average of 8.4°. This is colder than most places in Iowa.

In Katy, there are 102.1 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

In Waterloo, there are 11.5 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Katy, there are 9.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.

In Waterloo, there are 150.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Katy, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.

In Waterloo, there are 21.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

There is rarely any recorded snowfall in Katy, ranking it as one of the least snowy places in Texas.

An annual snowfall of 33.9 inches in Waterloo means that it is snowier than most places in Iowa.

Any measurable snowfall is a rare occurance in Katy.

December is the snowiest month in Waterloo with 9.6 inches of snow, and 6 months of the year have significant snowfall.