Weatherproof Brushless String Trimmers That Laugh at Rain
For most homeowners, the EGO Power+ ST1623T is the top pick because it combines a WeatherGuard IPX5 rated brushless motor with commercial grade cutting power. Owners report it powers through thick, wet grass without bogging down. The main limitation is its weight; at nearly 11 pounds, it can feel heavy during long sessions.
A string trimmer that dies the moment dew hits the grass is useless. That is why you need a weatherproof brushless model. Brushless motors are more efficient and durable, and when sealed properly, they shrug off moisture.
We compared seven of the best selling weatherproof brushless trimmers on Amazon. Our focus is on real world capability: how they perform in wet conditions, battery life, and ease of use. No fluff, just the facts you need to choose.
The shortlist, ranked
EGO Power+ ST1623T 16-Inch Commercial Grade String Trimmer
This EGO trimmer is a beast. It has a WeatherGuard system that protects against rain and dust. The brushless motor delivers high torque, and the dual feed head makes line replacement quick. Owners report it starts every time, even after being left out in a drizzle.
Pros
- IPX5 rated for rain
- Powerful brushless motor
- Rapid reload line head
Cons
- Heavy at 11 pounds
- Battery not included
DEWALT 20V MAX XR Brushless String Trimmer (DCST972X1)
DEWALT’s trimmer is built for tough jobs. Its brushless motor is sealed against moisture, and it can run in light rain. The variable speed trigger gives you control. With a 15 inch cutting swath, it clears weeds fast.
Pros
- High torque motor
- Variable speed trigger
- Folds for storage
Cons
- Not fully IP rated
- Battery and charger extra
Makita 18V LXT Brushless String Trimmer (XRU15PT1)
Makita’s trimmer is known for its efficient brushless motor. It sips battery power, so you can trim longer. It has an IPX4 rating, meaning it resists splashes. The bump and feed head is reliable.
Pros
- Excellent battery efficiency
- IPX4 splash resistant
- Lightweight at 8.6 lbs
Cons
- Narrower cutting path
- Requires 18V battery system
Greenworks Pro 80V Brushless String Trimmer (ST80L00)
Greenworks offers a powerful 80V brushless motor at a lower price point. It has a weather resistant housing that holds up to wet grass. The 16 inch cutting width matches pricier rivals. Owners appreciate the automatic feed head.
Pros
- Affordable price
- Wide cutting path
- Automatic line feed
Cons
- No IP rating
- Battery not included
BLACK+DECKER 40V MAX Brushless String Trimmer (LST522)
This Black+Decker trimmer is the lightest in our lineup at 7.5 pounds. It has a brushless motor that is rain resistant. The PowerDrive transmission delivers more torque. It is ideal for small to medium yards.
Pros
- Very lightweight
- Rain resistant design
- Quick load head
Cons
- Thinner line
- Battery separate
Ryobi 18V ONE+ HP Brushless String Trimmer (P20182)
Ryobi’s trimmer works with the extensive 18V ONE+ system. Its brushless motor is protected against water. The adjustable cutting width from 10 to 12 inches lets you handle tight spots. The grip is comfortable.
Pros
- Compatible with many batteries
- Adjustable width
- Ergonomic grip
Cons
- Narrow max width
- No IP rating
Craftsman V20 Brushless String Trimmer (CMETSP20B)
Craftsman offers a budget friendly brushless trimmer that still has weather resistant build. It has a 15 inch cutting width and a bump feed head. It is a solid choice if you are on a tight budget.
Pros
- Budget friendly
- Good cutting width
- Bump feed head
Cons
- Battery not included
- Less refined design
Side by side
| # | Model | Motor | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | EGO Power+ ST1623T 16-Inch Commercial Grade String Trimmer | Brushless | Best overall for wet conditions | 9.4 | Check price |
| 2 | DEWALT 20V MAX XR Brushless String Trimmer (DCST972X1) | Brushless | Best for heavy duty trimming | 9.2 | Check price |
| 3 | Makita 18V LXT Brushless String Trimmer (XRU15PT1) | Brushless | Best for battery life | 9.0 | Check price |
| 4 | Greenworks Pro 80V Brushless String Trimmer (ST80L00) | Brushless | Best value for power | 8.8 | Check price |
| 5 | BLACK+DECKER 40V MAX Brushless String Trimmer (LST522) | Brushless | Best for lightweight use | 8.5 | Check price |
| 6 | Ryobi 18V ONE+ HP Brushless String Trimmer (P20182) | Brushless | Best for versatility | 8.3 | Check price |
| 7 | Craftsman V20 Brushless String Trimmer (CMETSP20B) | Brushless | Best for budget buyers | 8.0 | Check price |
What to look for
Questions worth asking
Can I use a brushless string trimmer in the rain?
Yes, if it has an IPX4 or higher rating. These trimmers are designed to handle rain and splashes. However, avoid using it in a heavy downpour or submerging it in water.
What does IPX5 mean on a trimmer?
IPX5 means the trimmer is protected against water jets from any direction. It can withstand a low pressure water spray, making it highly resistant to rain and wet grass.
Do brushless trimmers have more power than brushed ones?
Generally, brushless motors are more efficient and can deliver more torque and longer runtime. They are also more durable because there are no brushes to replace.
Are all brushless trimmers weatherproof?
No, not all have an official IP rating. Some are weather resistant but not fully sealed. Check the specifications for water resistance ratings before buying.
How important is the battery for wet conditions?
The battery should be kept dry. Most trimmers have a battery compartment that protects it from splashes, but you should avoid leaving the battery exposed to rain. Store batteries indoors when not in use.
What is the best line size for wet grass?
A thicker line, like 0.095 inch, is better for wet grass because it is heavier and can cut through the thicker, wet vegetation without breaking as easily.
Can I replace the line on my trimmer?
Yes, almost all string trimmers have replaceable line. Some have automatic feed, while others use a bump feed. Check the user manual for the correct line size and replacement method.
How do I protect my trimmer from rust?
After each use, wipe down the trimmer to remove moisture and debris. Store it in a dry place. If you use it in saltwater areas, rinse it with fresh water and dry it thoroughly.
What is the advantage of a brushless motor for trimming wet grass?
A brushless motor is more resistant to moisture damage because it is sealed and has no exposed brushes. It also provides consistent power even under load, which is beneficial when cutting heavy, wet grass.
The verdict
If you want the best overall weatherproof brushless trimmer, get the EGO Power+ ST1623T. It has the highest IP rating and the most power. For a lighter option that still handles rain, the BLACK+DECKER LST522 is a good choice. But if you prioritize battery life and already own Makita tools, the Makita XRU15PT1 is excellent. Avoid trimmers without an IP rating if you frequently trim in wet conditions.
