Weatherproof Cordless Mowers That Laugh at Rain
The EGO Power+ LM2135SP leads our list for homeowners who mow dewy grass often. Its brushless motor and sealed deck handle damp conditions without clogging. Owners report a solid 45 minute runtime on a single charge. The main limitation is the price, which sits above many competitors.
Wet grass is the enemy of most electric mowers. Clippings stick, batteries short out, and traction suffers. But a new generation of weatherproof cordless mowers aims to change that.
We analyzed the market to find mowers that handle damp conditions without skipping a beat. Our picks are based on manufacturer specs, user experiences, and features that genuinely protect against moisture.
How to pick the right one
What we recommend
EGO Power+ LM2135SP 21-Inch Self-Propelled Mower
This EGO mower features a weather-resistant battery compartment and a sealed deck. It powers through wet grass without bogging down. The self-propelled drive makes it easy to push on slick terrain. Owners praise its consistent performance in damp conditions.
Pros
- Excellent wet grass handling
- Long runtime
- Powerful brushless motor
Cons
- Premium price
- Heavier than some
RYOBI 20-Inch 40V HP Brushless Cordless Mower
RYOBI’s 40V HP mower offers a weather-resistant design with a spray guard and sealed battery compartment. It cuts well in damp grass thanks to its high torque brushless motor. The push model is lightweight and easy to maneuver. It uses the versatile 40V battery platform.
Pros
- Affordable option
- Lightweight design
- Good wet grass performance
Cons
- Battery not included
- Smaller deck
Greenworks 21-Inch 60V Cordless Self-Propelled Mower
Greenworks 60V mower features a rear-wheel drive that provides excellent traction on wet slopes. The deck is designed to resist rust and the battery is IPX4 water resistant. It offers variable speed control for adapting to conditions. Owners like its quiet operation and reliable start.
Pros
- Great traction on hills
- Variable speed
- Water resistant battery
Cons
- Battery and charger extra
- Some report plastic deck flex
Milwaukee M18 Fuel 21-Inch Self-Propelled Mower
Milwaukee’s M18 Fuel mower is built for tough jobs, with a cast aluminum deck that resists corrosion. Its PowerState brushless motor delivers high torque even in wet grass. The battery system is IPX4 rated for water resistance. It features a dual battery design for extended runtime.
Pros
- Aluminum deck
- Powerful and durable
- Excellent water resistance
Cons
- Very expensive
- Heavy
WORX 20V Power Share 20-Inch Cordless Lawn Mower
The WORX 20V mower is a compact option for small lawns. It features a weatherproof battery compartment and a steel cutting blade. Its foldable handle saves storage space. It is not as powerful as larger models but handles light dew well.
Pros
- Compact and foldable
- Affordable price
- Easy to store
Cons
- Short runtime
- Not for thick wet grass
CRAFTSMAN 40V 20-Inch Self-Propelled Mower
Craftsman’s 40V self-propelled mower has a variable speed trigger for effortless control. Its weather-resistant construction includes a sealed deck and battery cover. The single lever height adjustment simplifies setup. It cuts wet grass with minimal clumping according to owners.
Pros
- Easy to use controls
- Good wet grass mulching
- Comfortable handle
Cons
- Battery not included
- Some report weak drive motor
Snapper 82V 21-Inch Self-Propelled Mower
Snapper’s 82V mower runs exceptionally quiet, making it ideal for early mornings. It has a weatherproof battery and a cutting deck that resists rust. The self-propelled system offers rear-wheel drive for good traction. It includes a rapid charger and battery.
Pros
- Very quiet
- Battery included
- Good build quality
Cons
- Battery replacement is costly
- Slightly heavy
How they stack up
| # | Model | Deck Size | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | EGO Power+ LM2135SP 21-Inch Self-Propelled Mower | 21 inches | Large wet lawns | 9.4 | Check price |
| 2 | RYOBI 20-Inch 40V HP Brushless Cordless Mower | 20 inches | Budget conscious | 9.0 | Check price |
| 3 | Greenworks 21-Inch 60V Cordless Self-Propelled Mower | 21 inches | Steep slopes | 8.8 | Check price |
| 4 | Milwaukee M18 Fuel 21-Inch Self-Propelled Mower | 21 inches | Professional grade | 9.2 | Check price |
| 5 | WORX 20V Power Share 20-Inch Cordless Lawn Mower | 20 inches | Small yards | 8.2 | Check price |
| 6 | CRAFTSMAN 40V 20-Inch Self-Propelled Mower | 20 inches | Ease of use | 8.6 | Check price |
| 7 | Snapper 82V 21-Inch Self-Propelled Mower | 21 inches | Quiet operation | 8.4 | Check price |
Frequently asked questions
Can I use a cordless mower in light rain?
Yes, most cordless mowers with weather-resistant features can handle light rain, but it is best to avoid downpours. If the mower has an IPX4 battery rating and a sealed deck, it will resist splashes. Always dry the mower after use.
Will wet grass damage a cordless mower?
Wet grass itself will not damage a mower if the deck is sealed and the battery is protected. However, leaving wet clippings to dry on the deck can cause rust. Clean the underside after each use, especially after mowing damp grass.
How do I know if a mower is weatherproof?
Check the specifications for an IP rating on the battery and motor. IPX4 means protected against splashes. Also look for features like sealed bearings and a reinforced deck that resists corrosion. Manufacturer descriptions often mention ‘weather resistant’.
What is the best deck material for wet conditions?
Aluminum decks are the most resistant to rust and warping. Steel decks are durable but can rust if not properly coated. Plastic decks are lightweight and never rust, but they may flex under stress. For wet grass, aluminum is the top choice.
How long do batteries last in wet conditions?
Battery runtime is not affected by moisture if the battery is properly sealed. However, cold and wet weather can reduce efficiency. In general, expect the same runtime as in dry conditions, but always store and charge batteries indoors.
Is it safe to charge a mower battery outside?
No, never charge a battery outside in wet conditions. Charging should always be done in a dry, temperature controlled area. Moisture can cause short circuits and fires. Always bring the battery inside to charge.
Do all cordless mowers have washout ports?
No, washout ports are a feature on many higher end models. They allow you to attach a hose to clean the deck quickly. If you mow wet grass often, look for a mower with a washout port for easy maintenance.
Can I mow the lawn when it is just dewy?
Yes, mowing dewy grass is generally fine. Morning dew provides some moisture that can help cut cleanly, but it can also cause clumping. Raise the deck and use a sharp blade to minimize issues.
What is the warranty on weatherproof mowers?
Most brands offer a 3 to 5 year warranty on the mower and a separate warranty on the battery, often 2 to 3 years. Check the specific model for details. Weatherproof features do not usually affect warranty, but water damage may not be covered.
How do I store my mower to prevent weather damage?
Store your mower in a dry shed or garage. Remove the battery and store it separately indoors. Clean the deck and let it dry completely before storing. Cover the mower to protect from dust and moisture.
Our pick
For most homeowners, the EGO Power+ LM2135SP is the best choice due to its strong wet grass performance and long runtime. If you are on a budget, the RYOBI 40V HP offers solid weather resistance at a lower price. For steep, wet slopes, the Greenworks 60V is the smart pick.
